- import numpy as np
- Request is deprecated
- Python 2.x is deprecated (Python 2.7 is usually pre-installed on Macs 3-7 years from 2020).
- mylist = [1,2,3,4]
- np_array= np.array(mylist)
- Entire list mylist[:]
- Slicing zeroth to 0th, 1st element mylist[0:2]
- The second position is exclusive
- Function signature
- What type of input is expected? Example CSV
- What type of output is expected?
- What is the functionaltiy
- Each functionality does one task
- Using an IDE
- Anaconda Spyder (Scientific Python Development Environment)
- PyCharm What is pycharm https://ml.learn-to-code.co/skillView.html?skill=Bx3bnZQvelMdHisZlQnj
- Why use an IDE:
- tool kit plugin
- Pycharm can also refactor update references when files move
- get styling hints: json does not allow trailing comma
- error highlighting
- which python
- this command is used to check which python version is launched
- pip is the package management tool. It is used to install python software packages. Can also use pip to install another package manager, specializing in data science tasks called anaconda.
- In any language, do not overly rely on print statements for debugging.
- String is immutable example: string" = 3 # TypeError: 'str' object does not support item assignment
- Use indentation to track code hierarchy, nested function calls etc.
- Type hinting : modern python can specify variable types and get type hinting as a result. todo add flash card
- Use args[index_num] to access one of the inputs (to a function, by indexing the list of arguments)
- The last element in a python list does not have the next method, if calling next() on a python list generator when it is already the last item, there will be an error. next(my_generator) --> StopIteration
Monday, March 23, 2020
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