reformat + change name
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@@ -1,7 +0,0 @@
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# python prerequisites
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python is a programming language
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## jupyter support
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might convert py to ipynb later
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@@ -0,0 +1,9 @@
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# python prerequisites
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python is a programming language
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you can read the tutorials (and load them to your device!) if you never used python
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## jupyter support
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for the purpose of math i use jupyter it is also better than plain py files if you are doing math
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@@ -703,6 +703,7 @@ def lda_print_example_arg(inst):
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print("instance:", inst.lda_example_instance_arg)
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print("instance:", inst.lda_example_instance_arg)
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print("class:", inst.lda_example_class_arg)
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print("class:", inst.lda_example_class_arg)
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# @classmethod # class methods passes class as opposed of instance for first arg # i just knew this!
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# @classmethod # class methods passes class as opposed of instance for first arg # i just knew this!
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# def cls_print_example_arg(cls):
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# def cls_print_example_arg(cls):
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# print("class:", cls.lda_example_class_arg)
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# print("class:", cls.lda_example_class_arg)
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+23
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@@ -6,7 +6,7 @@
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"source": [
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"source": [
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"# Python tutorial\n",
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"# Python tutorial\n",
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"\n",
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"\n",
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"this is a python tutorial in jupyter notebook! this will serve as a continuation of that last one."
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"this is a python tutorial in jupyter notebook! this will serve as a continuation of that last one.\n"
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]
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]
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},
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},
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{
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{
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@@ -17,7 +17,7 @@
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"\n",
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"\n",
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"ok mr complainer here we go:\n",
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"ok mr complainer here we go:\n",
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"\n",
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"\n",
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"### basic"
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"### basic\n"
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]
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]
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},
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},
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{
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{
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@@ -39,7 +39,7 @@
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"source": [
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"source": [
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"above is an interactive piece of code. you will press run and it will remember.\n",
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"above is an interactive piece of code. you will press run and it will remember.\n",
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"\n",
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"\n",
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"If you didnt press run this one will show error:"
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"If you didnt press run this one will show error:\n"
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]
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]
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},
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},
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{
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{
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@@ -74,7 +74,7 @@
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"\n",
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"\n",
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"list, dict, set is mutable, \n",
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"list, dict, set is mutable, \n",
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"dict keys and set items are unique, \n",
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"dict keys and set items are unique, \n",
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"index list and tuple by index and dict by keys."
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"index list and tuple by index and dict by keys.\n"
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]
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]
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},
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},
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{
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@@ -111,7 +111,7 @@
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"source": [
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"source": [
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"### function\n",
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"### function\n",
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"\n",
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"\n",
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"function is declared with `def`:"
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"function is declared with `def`:\n"
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]
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]
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},
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},
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@@ -128,7 +128,7 @@
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"cell_type": "markdown",
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"cell_type": "markdown",
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"metadata": {},
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"metadata": {},
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"source": [
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"source": [
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"you can violate type hints:"
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"you can violate type hints:\n"
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]
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]
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},
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},
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{
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{
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@@ -156,7 +156,7 @@
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"cell_type": "markdown",
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"cell_type": "markdown",
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"metadata": {},
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"metadata": {},
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"source": [
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"source": [
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"### control flow, conditional"
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"### control flow, conditional\n"
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]
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]
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},
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},
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{
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{
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@@ -238,7 +238,7 @@
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"\n",
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"\n",
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"exceptions are python errors. you can let it crash, catch with try except, or raise one yourself.\n",
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"exceptions are python errors. you can let it crash, catch with try except, or raise one yourself.\n",
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"\n",
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"\n",
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"Some common ones are `ValueError` `TypeError` and `OSError` type shit"
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"Some common ones are `ValueError` `TypeError` and `OSError` type shit\n"
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]
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]
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},
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{
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{
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@@ -259,7 +259,7 @@
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"source": [
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"source": [
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"### class\n",
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"### class\n",
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"\n",
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"\n",
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"class. methods. backbone of python."
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"class. methods. backbone of python.\n"
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]
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]
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},
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@@ -306,7 +306,7 @@
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"for a function in a class it would be marked a classmethod (`@classmethod`) and with classmethods the instance get passed in first arg.\n",
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"for a function in a class it would be marked a classmethod (`@classmethod`) and with classmethods the instance get passed in first arg.\n",
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"`@staticmethod` used in the class block revert this behavior.\n",
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"`@staticmethod` used in the class block revert this behavior.\n",
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"\n",
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"\n",
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"check the tutorial.py file im lazy"
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"check the tutorial.py file im lazy\n"
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]
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},
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{
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@@ -353,7 +353,7 @@
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"collection = [something, something_else,]\n",
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"collection = [something, something_else,]\n",
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"def function(x) -> y: ...\n",
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"def function(x) -> y: ...\n",
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"\n",
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"\n",
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"new_collection = map(function, collection) \n",
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"new_collection = map(function, collection)\n",
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"# => each x you run function on it and it returns y.\n",
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"# => each x you run function on it and it returns y.\n",
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"# put that y in the place x would be in the new_collection\n",
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"# put that y in the place x would be in the new_collection\n",
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"\n",
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"\n",
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@@ -370,7 +370,9 @@
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"\n",
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"\n",
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"remember map and filter doesnt return a list back but a special generator object so you would have to call list() on it to use as list.\n",
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"remember map and filter doesnt return a list back but a special generator object so you would have to call list() on it to use as list.\n",
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"\n",
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"\n",
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"why? for performance. generator is lazy."
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"why? for performance. generator is lazy.\n",
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"\n",
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"what the fuck is a generator? well i aint explaining that one. keyword: `yield`.\n"
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]
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@@ -383,7 +385,7 @@
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"\n",
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"\n",
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"comprehension. fuck do i know what it means. you dont know half these words and so do i.\n",
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"comprehension. fuck do i know what it means. you dont know half these words and so do i.\n",
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"\n",
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"\n",
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"a simple way to do fiter_map ig"
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"a simple way to do fiter_map ig\n"
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]
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]
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@@ -408,19 +410,21 @@
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"cell_type": "markdown",
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"cell_type": "markdown",
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"metadata": {},
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"metadata": {},
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"source": [
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"source": [
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"its: \n",
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"its:\n",
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"\n",
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"```python\n",
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"```python\n",
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"something(vals) for vals in collection if condition(vals) if condition2(vals) if etc.\n",
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"something(vals) for vals in collection if condition(vals) if condition2(vals) if etc.\n",
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"```\n",
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"```\n",
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"\n",
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"and `something(vals)` could well be another comprehension.\n",
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"and `something(vals)` could well be another comprehension.\n",
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"\n",
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"\n",
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"notice for in if. strictly for in if, and not if for in. that if is of something else.\n",
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"notice: `for in if`. **strictly** for in if, and not if for in. that if is of something else.\n",
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"\n",
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"\n",
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"oh but `something if condition else something_else` i also see how is that\n",
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"oh but `something if condition else something_else` i also see that what about that\n",
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"\n",
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"\n",
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"well that is another shorthand unrelated, but if you can use sure go ahead\n",
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"well that is another shorthand unrelated to this one, but if you can use sure go ahead\n",
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"\n",
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"\n",
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"its kinda like the Ternary conditional operator `cond ? true_expr : false_expr` in c or typescript and yes you can go crazy with it just like with typescript"
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"its kinda like the Ternary conditional operator `cond ? true_expr : false_expr` in c or typescript and yes you can go crazy with it just like with typescript\n"
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]
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]
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{
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@@ -474,7 +478,7 @@
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"\n",
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"\n",
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"so numpy dont use python types. numpy uses its own types. its own functions. almost all of them not from python but from C for all the speed\n",
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"so numpy dont use python types. numpy uses its own types. its own functions. almost all of them not from python but from C for all the speed\n",
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"\n",
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"\n",
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"try ctrl space the just imported np object. snoop around. its complicated. theres so much. we dont use much of it tho."
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"try ctrl space the just imported np object. snoop around. its complicated. theres so much. we dont use much of it tho.\n"
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]
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}
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}
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+1
-1
@@ -129,7 +129,7 @@
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"source": [
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"source": [
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"### numpy array (matrix) operations\n",
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"### numpy array (matrix) operations\n",
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"\n",
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"\n",
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"the slides (and numpy also) have all the shit: the slice which we just covered, np.transpose `'`, np.matmul `*`, np.multiply `.*`, matrix divide `/` with np.dot and np.linarg.inv, np.divide `./`, concat arrays with np.concatenate np.stack or np.block etc.\n",
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"the slides (and numpy also) have all the shit: the slice which we just covered, np.transpose `'`, np.matmul `*`, np.multiply `.*`, matrix divide `/` maybe with np.dot and np.linarg.inv, np.divide `./`, concat arrays with np.concatenate np.stack or np.block etc.\n",
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"\n",
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"\n",
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"### math functions\n",
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"### math functions\n",
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"\n",
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"\n",
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