python_tutorials/python101.txt at master · lselector/python_tutorials · GitHub

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Python has become THE language of Data Science.
Everybody uses Anaconda python distribution.

The main dev. environment is JupyterLab:
  https://jupyterlab.readthedocs.io/en/stable/

Also you need a simple text editor, for example:
  https://www.sublimetext.com/

Look on youtube for online tutorials for:

    python, pandas, numpy, scikit-learn

for example:

Python Programming - tutorial by Derek Banas:
 - https://www.youtube.com/watch?v=N4mEzFDjqtA

Python Pandas Data Science Tutorial by Keith Galli:
 - https://www.youtube.com/watch?v=vmEHCJofslg

Python NumPy Tutorial by Edureka:
 - https://www.youtube.com/watch?v=8JfDAm9y_7s

Scikit-Learn Tutorial by Simplilearn:
 - https://www.youtube.com/watch?v=0Lt9w-BxKFQ

Python main data structures:

  a = 1
  b = 2.5
  c = "crocodile"
  d = 'big mouse'
  e = """multi-line
         string"""
  # ---------------------
  f = list()
  f = [1,"mama", 2.5]
  # ---------------------
  g = (1,2,3)          # tuple immutable
  h = tuple([1,2,3])   # same tuple
  # ---------------------
  h = set([1,1,2,2,3,3])  # {1,2,3} set removes duplicates
  h = {1,2,3}             # same set
  # ---------------------
  i = dict()
  i = {"k1":"v1", "k2":"v2"}
  i["k3"] = "v3"
  if "k3" in i:
      ...

  aa = i["k1"]   # "v1"
  del i["k1"]
  # ---------------------

Python common keywords and expressions:

True, False, None

if, elif, else, finally

if (a == b or c != d) and (e==f):
    pass

for ii in range(5):
    print(ii)

def myfunction():
    pass  # placeholder
    return something

import os, sys
from mymodule import myfunc

while ... :
    pass
    if ...:
        continue
    if ...:
        break
    pass

try:
   pass # do something
except:
   pass # processs error
   raise some_error

if "a" in mystring:
    do_something

if "a" not in mystring:
    do_something

ii = 0
while ii < 10:
    ii += 1
    print(ii)

with open("myfile.txt") as fh:
    txt = fh.read()

Some other keywords:
    await
    class
    is
    lambda
    nonlocal
    assert
    global
    async
    yield

See for example here:

  https://realpython.com/python-keywords/