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sys Variables                                     String Methods                                        Datetime Methods

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Python cheat-sheet-v1


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Python cheat-sheet-v1

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