Python/CheatSheet: Difference between revisions

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== Dictionaries ==
== Dictionaries ==
* mapping
<blockquote>
<pre>
e = {'size':5, 'color':'red', 'weight':100}
</pre>
</blockquote>
<blockquote>
<pre>
e['size']
-> 5
</pre>
</blockquote>


= Flow Control =
= Flow Control =

Revision as of 20:23, 27 September 2017

Variables

Tuples

  • not changeable
a = (1,2,3)
b = ("test", "with", "strings")
b[0]
-> test

Lists

  • changeable
c = [4,5,6]
d = ["this", "is", "a", "list"]
d[0]
-> this

Dictionaries

  • mapping
e = {'size':5, 'color':'red', 'weight':100}
e['size']
-> 5

Flow Control

If Then Else

if x < 0:
    print('Negative')
elif x == 0:
    print('Zero')
else:
    print('More')


For loops

for x in ['cat', 'dog', 'bird']:
    print (w)


While loops

while test:
    print (answer)


while True:
    print (answer)
    if answer == '2':
        break


Strings

string = "Hello World"
string = 'Hello World'

string[4]                             # = 'o'
string.split(' ')                     # ['Hello', 'World']

String functions

capitalize()
center(width)
count(sub,start,end)
decode()
encode()
endswith(sub)
expandtabs()
find(sub,start,end)
index(sub,start,end)
isalnum()
isalpha()
isdigit()
islower()
isspace()
istitle()
isupper()
join()
ljust(width)
lower()
lstrip()
partition(sep)
replace(old,new)
rfind(sub,start,end)
rindex(sub,start,end)
rjust(width)
rpartition(sep)
rsplit(sep)
rstrip()
split(sep)
splitlines()
startswith(sub)
strip()
swapcase()
title()
translate(table)
upper()
zfill(width)

Functions

datetime

today()
now(timezoneinfo)
utcnow()
fromordinal(ordinal)
combine(date,time)
strptime(date,format)
fromtimestamp(timestamp)
utcfromtimestamp(timestamp)

time

replace()
utcoffset()
isoformat()
__str__()
dst()
tzname()
strftime(format)

strftime & strptime format












Escape sequences

ES Note
\\ backslash
\' '
\" "
\b backspace
\f form feed
\n line feed
\t horizontal tab
\v vertical tab
\N{Name} Unicode by name
\uxxxx 16bit unicode
\uxxxxxxxx 32bit unicode
\123 ASCII code
\xhh Extended ASCII code (hex)