Doku Wiki

First pass at Python course topics.

Links:

… coming …

• Python_file_hierarchy

• python3 (Python 3.7)

$ python3 -V
Python 3.7.4
$

• string operations
• string slices

• “else” clause on loop constructs
• range() function is an “iterable”
• keyword arguments
• lambda expressions
• docstrings
• function annotation(???)

• lists
• “import collections” (deque)
• list comprehensions
• set
• dictionary
  • key can be any immutable type
  • “list(d)” returns list of keys
• “enumerate()” routine for any sequence
• “zip()” to iterate over two sequences simultaneously

• string method join()
• data types, numbers, literals
• “_” as last value interactively
• single and double quoted strings identical effectively
• raw strings
• “iterable” objects (“for” is an “iterator”)
  • list(range(1,10))
  • tuple(range(1,10))
• loops and trailing “else” construct

• >>> quit()
• PEP-8
• function annotations

import sys
print(sys.argv[0])

>>> print("hi")
>>> print("I am", age, "years old.")
>>> print(f"I am {age} years old.")     (format string)

>>> hilarious = False
>>> joke_evaluation = "Isn't that joke so funny?! {}"
>>> print(joke_evaluation.format(hilarious))
>>> print("Isn't that funny? {}".format(hilarious))

>>> print(end1 + end2 + end3 + end4 + end5 + end6, end=' ')
>>> print(end7 + end8 + end9 + end10 + end11 + end12)

>>> formatter = "{} {} {} {}"
>>> print(formatter.format(1, 2, 3, 4))
>>> print(formatter.format("one", "two", "three", "four"))

Raw strings: r“blah blah”

print("""\
Usage: thingy [OPTIONS]
     -h                        Display this usage message
     -H hostname               Hostname to connect to
""")