Cases I
s.capitalize()
Capitalize s # 'hello' => 'Hello'
s.lower()
Lowercase s # 'HELLO' => 'hello'
s.swapcase()
Swap cases of all characters in s # 'Hello' => "hELLO"
s.title()
Titlecase s # 'hello world' => 'Hello World'
s.upper()
Uppercase s # 'hello' => 'HELLO'
Sequence Operations I
s2 in s
Return true if s contains s2
s + s2
Concat s and s2
len(s)
Length of s
min(s)
Smallest character of s
max(s)
Largest character of s
Sequence Operations II
s2 not in s
Return true if s does not contain s2
s * integer
Return integer copies of s concatenated # 'hello' => 'hellohellohello'
s[index]
Character at index of s
s[i:j:k]
Slice of s from i to j with step k
s.count(s2)
Count of s2 in s
Whitespace I
s.center(width)
Center s with blank padding of width # 'hi' => ' hi '
s.isspace()
Return true if s only contains whitespace characters
s.ljust(width)
Left justifiy s with total size of width # 'hello' => 'hello '
s.rjust(width)
Right justify s with total size of width # 'hello' => ' hello'
s.strip()
Remove leading and trailing whitespace from s # ' hello ' => 'hello'
Find / Replace I
s.index(s2, i, j)
Index of first occurrence of s2 in s after index i and before index j
s.find(s2)
Find and return lowest index of s2 in s
s.index(s2)
Return lowest index of s2 in s (but raise ValueError if not found)
s.replace(s2, s3)
Replace s2 with s3 in s
s.replace(s2, s3, count)
Replace s2 with s3 in s at most count times
s.rfind(s2)
Return highest index of s2 in s
s.rindex(s2)
Return highest index of s2 in s (raise ValueError if not found)
Cases II
s.casefold()
Casefold s (aggressive lowercasing for caseless matching) # 'ßorat' => 'ssorat'
s.islower()
Return true if s is lowercase
s.istitle()
Return true if s is titlecased # 'Hello World' => true
s.isupper()
Return true if s is uppercase
Inspection I
s.endswith(s2)
Return true if s ends with s2
s.isalnum()
Return true if s is alphanumeric
s.isalpha()
Return true if s is alphabetic
s.isdecimal()
Return true if s is decimal
s.isnumeric()
Return true if s is numeric
s.startswith(s2)
Return true is s starts with s2
Splitting I
s.join('123')
Return s joined by iterable '123' # 'hello' => '1hello2hello3'
s.partition(sep)
Partition string at sep and return 3-tuple with part before, the sep itself, and part after # 'hello' => ('he', 'l', 'lo')
s.rpartition(sep)
Partition string at last occurrence of sep, return 3-tuple with part before, the sep, and part after # 'hello' => ('hel', 'l', 'o')
s.rsplit(sep, maxsplit)
Return list of s split by sep with rightmost maxsplits performed
s.split(sep, maxsplit)
Return list of s split by sep with leftmost maxsplits performed
s.splitlines()
Return a list of lines in s # 'hello\nworld' => ['hello', 'world']
Inspection II
s[i:j]
Slice of s from i to j
s.endswith((s1, s2, s3))
Return true if s ends with any of string tuple s1, s2, and s3
s.isdigit()
Return true if s is digit
s.isidentifier()
Return true if s is a valid identifier
s.isprintable()
Return true is s is printable
Whitespace II
s.center(width, pad)
Center s with padding pad of width # 'hi' => 'padpadhipadpad'
s.expandtabs(integer)
Replace all tabs with spaces of tabsize integer # 'hello\tworld' => 'hello world'
s.lstrip()
Remove leading whitespace from s # ' hello ' => 'hello '
s.rstrip()
Remove trailing whitespace from s # ' hello ' => ' hello'
s.zfill(width)
Left fill s with ASCII '0' digits with total length width # '42' => '00042'
