Python Cheat Sheet (2009).pdf

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Python Cheat Sheet
sys Variables
String Methods
Datetime Methods
argv
builtin_module_names
byteorder
check_interval
exec_prefix
executable
exitfunc
modules
path
platform
stdin, stdout, stderr
version_info
winver
Command line args
Linked C modules
Native byte order
Signal check frequency
Root directory
Name of executable
Exit function name
Loaded modules
Search path
Current platform
File objects for I/O
Python version info
Version number
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)
today()
now(timezoneinfo)
utcnow()
fromtimestamp(timestamp)
utcfromtimestamp(timestamp)
fromordinal(ordinal)
combine(date, time)
strptime(date, format)
Time Methods
replace()
isoformat()
__str__()
strftime(format)
utcoffset()
dst()
tzname()
Date Formatting (strftime and strptime)
sys.argv for $ python foo.py bar -c qux --h
%a
%A
%b
%B
%c
%d
%H
%I
%j
%m
%M
%p
%S
%U
%w
%W
%x
%X
%y
%Y
%Z
%%
Abbreviated weekday (Sun)
Weekday (Sunday)
Abbreviated month name (Jan)
Month name (January)
Date and time
Day (leading zeros) (01 to 31)
24 hour (leading zeros) (00 to 23)
12 hour (leading zeros) (01 to 12)
Day of year (001 to 366)
Month (01 to 12)
Minute (00 to 59)
AM or PM
Second (00 to 61 4 )
Week number 1 (00 to 53)
Weekday 2 (0 to 6)
Week number 3 (00 to 53)
Date
Time
Year without century (00 to 99)
Year (2008)
Time zone (GMT)
A literal "%" character (%)
sys.argv[0]
sys.argv[1]
sys.argv[2]
sys.argv[3]
sys.argv[4]
foo.py
bar
-c
qux
--h
Note
Methods marked * are locale
dependant for 8-bit strings.
os Variables
altsep
curdir
defpath
devnull
extsep
linesep
name
pardir
pathsep
sep
Alternative sep
Current dir string
Default search path
Path of null device
Extension separator
Line separator
Name of OS
Parent dir string
Patch separator
Path separator
List Methods
append(item)
count(item)
extend(list)
index(item)
insert(position, item)
pop(position)
remove(item)
reverse()
sort()
File Methods
close()
flush()
fileno()
isatty()
next()
read(size)
readline(size)
readlines(size)
seek(offset)
tell()
truncate(size)
write(string)
writelines(list)
Note
Registered OS names: “posix”, “nt”,
“mac”, “os2”, “ce”, “java”, “riscos”
Class Special Methods
1.
Sunday as start of week. All days in a
new year preceding the first Sunday
are considered to be in week 0.
__new__(cls)
__init__(self, args)
__del__(self)
__repr__(self)
__str__(self)
__cmp__(self, other)
__index__(self)
__hash__(self)
__getattr__(self, name)
__getattribute__(self, name)
__setattr__(self, name, attr)
__delattr__(self, name)
__call__(self, args, kwargs)
__lt__(self, other)
__le__(self, other)
__gt__(self, other)
__ge__(self, other)
__eq__(self, other)
__ne__(self, other)
__nonzero__(self)
Indexes and Slices (of a=[0,1,2,3,4,5])
2.
0 is Sunday, 6 is Saturday.
len(a)
a[0]
a[5]
a[-1]
a[-2]
a[1:]
a[:5]
a[:-2]
a[1:3]
a[1:-1]
b=a[:]
6
0
5
5
4
[1,2,3,4,5]
[0,1,2,3,4]
[0,1,2,3]
[1,2]
[1,2,3,4]
Shallow copy of a
3.
Monday as start of week. All days in a
new year preceding the first Monday
are considered to be in week 0.
4.
This is not a mistake. Range takes
account of leap and double-leap
seconds.
Available free from AddedBytes.com
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