Simple Python Reference List

Zen of Python (Brief)

• Beautiful is better than ugly.
• Simple is better than complex.
• Complex is better than complicated.
• Readability counts.

Keywords:

False, None, True, and, as, assert, break, class, continue, def, del, elif, else, except, finally, for, from, global, if, import, in, is, lambda, nonlocal, not, or, pass, raise, return, try, while, with, yield

Lists:

• list.append(item)
• list.extend(list)
• list.insert(location, item)
• list.remove(item)
• list.pop(item)
• list.index(item)
• list.count(item)
• list.sort()
• list.reverse()

Files:

• openFile = open(filename, mode)
• openFile.read(amount)
• openFile.readlines(amount)
• openFile.write(data)
• openFile.close()

File Access Modes

• 'r' - Read Access
• 'w' - Write Access (overwites existing)
• 'a' - Append Access

Example: with open('filename', 'mode') as openFile:

Strings:

• string.capitalize()
• string.center(width)
• string.count(substring)
• string.decode()
• string.encode()
• string.endswith(substring)
• string.find(substring)
• string.format()
• string.isalnum()
• string.isalpha()
• string.isdecimal()
• string.isdigit()
• string.islower()
• string.isnumeric()
• string.isspace()
• string.istitle()
• string.isupper()
• string.join()
• string.ljust(width)
• string.lower()
• string.lstrip()
• string.replace(original, replacement)
• string.rjust(width)
• string.rstrip()
• string.startswith(substring)
• string.strip()
• string.swapcase()
• string.title()
• string.upper()

Manipulate Strings

• '+' - Join Strings Together
• '*' - Repeat String X Times
• '[ ]' - Select Character at Index
• '[ : ]' - Range Select Characters in Index
• 'in' - Returns True if Character(s) in String
• 'not in' - Returns True if Character(s) not in String

Arithmetic Operators

• '+' Addition
• '-' Subtraction
• '*' Multiplication
• '/' Division
• '%' Modulus
• '//' Floor Division
• '**' Exponent

Add an '=' after an operator to assign values. For example, 'a += b' assigns the value of 'a + b' to the variable 'a'.

Comparisons

• '==' Equality
• '!=' Not Equal
• '>' Greater Than
• '<' Less Than
• '>=' Greater Than or Equal
• '<=' Less Than or Equal

Data Types

• int(x) - Integer Type
• str(x) - String Type
• float(x) - Floating Point
• chr(x) - Character
• unichr(x) - Unicode Character
• ord(x) - Integer value
• hex(x) - Hexadecimal String
• oct(x) - Octal String

Datetime strftime() Method

• '%A' - Full Weekday Name
• '%B' - Full Month Name
• '%c' - Local Date and Time
• '%d' - Day of the month number
• '%f' - Microsecond
• '%H' - Hour number
• '%j' - Day of the Year
• '%m' - Month number
• '%M' - Minute number
• '%p' - AM/PM Local
• '%S' - Second number
• '%w' - Week Day number
• '%X' - Local Time
• '%Y' - Year
• '%Z' - Timezone Name

Regular Expression Metacharacters

• '.' - Any Character
• '^' - First Characters
• '$' - Last Characters
• '*' - Zero or More Characters
• '+' - One or More Characters
• '?' - Zero or One Characters
• '{ }' - Multiple Characters