Python/CheatSheet

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

d[0] = 'new'
d[0:1] = ['new', 'stuff']
d.append('dude')
d.count('new')
del d[0:1]
d.extend(['more', 'elements']
d.index(x)
d.insert(i,x)
d.pop()
d.remove(x)
d.reverse()
d.sort()

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)

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)