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Create / delete
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Create string
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a=""
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a="abcdef"
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abcdef
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Initialise
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Fixed contents
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a=""
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a="abcdef";
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abcdef
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Repeated value 'x' x 10
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c='x'
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a=c*10
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xxxxxxxxxx
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Count
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Length of string
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a="abc"
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i=len(a)
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3
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Number of 'X' chars in string
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a="abcXdefXX"
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n=a.count('X')
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3
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Number of 'X', 'Y' and 'Z' chars in string
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a="abcXdefYZ"
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n=a .count('X') +a .count('Y')+a.count('Z')
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3
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Number of 'abc' substrings in string
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a="abcabcdefabc"
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n=a.count('abc')
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3
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Retrieve by index
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Retrieve 1st char
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a="abc";
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c=a[0]
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a
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Retrieve last char
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a="abc";
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c=a[-1]
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c
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Retrieve char 'n'
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a="abcdef";
n=2;
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c=a[n]
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c
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Retrieve out-of-bounds char
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a="abc"; n=4
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try: c=a[n]
except: c="out of range"
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out of range
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Slice
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Slice from index 'm' to 'n' (inclusive)
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a="abcdefghi";
m=3;
n=6;
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s=a[m:n+1]
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defg
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Slice from index 'n' (inclusive)
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a="abcdefghi";
n=3;
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s=a[n:]
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defghi
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Slice up to index 'n' (inclusive)
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a="abcdefghi";
n=3;
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s=a[:n+1]
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abcd
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Compare
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Test for equality (case sensitive)
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a="abcdef";
b="abc";
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t=(a==b)
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0
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Test for equality (case insensitive)
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a="abcdef";
b="ABCdef";
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t=(re.match("^"+a+"$", b, re.IGNORECASE)!=None)
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1
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Test for prefix
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a="abcdef";
b="abc";
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t=(re .match("^" +b+".*",a)!=None)
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1
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Test for suffix
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a="abcdef";
b="def";
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t=(re .match(".*" +b+"$",a)!=None)
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1
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Search
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Test char 'is in' string
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a="abcdefghi";
c='c';
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t=(string.find(a,c) != -1)
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1
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Test substring 'is in' string
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a="abcdefghi";
b="abc";
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t=(string.find(a,b) != -1)
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1
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Find index of char (forward)
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a="abcdefccccc";
c='c';
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i=string.index(a,c)
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2
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Find index of char (reverse)
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a="abcdefccccc";
c='c';
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i=string.rindex(a,c)
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10
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Find index of substring (forward)
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a="abcdefabc";
b="abc";
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i=string.index(a,b)
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0
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Find index of substring (reverse)
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a="abcdefabc";
b="abc";
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i=string.rindex(a,b)
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6
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Split
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Split on char
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a="one,two,three";
c=',';
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sa=string.split(a,c)
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one two three
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Split on string
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a="aa_x_bb_x_cc";
b="_x_";a
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sa=string.split(a,b)
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aa bb cc
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Split limited to 'n' parts
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a="one,two,three";
c=',';
n=2;
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sa=string.split(a,c,n-1)
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one two,three
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Iterate
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Iterate through string
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a="abcdef";
b=""
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for x in a: b=(b+x+',')
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a,b,c,d,e,f,
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Evaluate
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Evaluate empty string
|
a=""
t=0
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if a: t=1
|
0
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Evaluate non-empty string
|
a="abcdef"
t=0
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if a: t=1
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1
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Print
|
Formatting sprintf style
|
a="abc";
b="abcdef"
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s="%10s %10s" % ( a, b )
|
abc abcdef
|
Insert
|
Prepend char
|
a="bcdef";
c='a';
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a=c+a
|
abcdef
|
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Append char
|
a="abc";
c='d';
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a=a+c
|
abcd
|
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Insert char at index 'n'
|
a="abc";
c='X';
n=1;
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a=a[:n]+c+a[n:]
|
aXbc
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Prepend string
|
a="def"
b="abc"
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a=b+a
|
abcdef
|
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Append string
|
a="abc"
b="def"
|
a=a+b
|
abcdef
|
|
Insert string at index 'n'
|
a="abcghi";
b="def";
n=3;
|
a=a[:n]+b+a[n:]
|
abcdefghi
|
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Concatenate 'a' and 'b'
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a="abc";
b="def";
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s=a+b
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abcdef
|
Overwrite
|
Overwrite char at index 'n'
|
a="abc";
n=1;
c='B';
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ca=array('c'); ca.fromstring(a); ca[n]='B'; a=ca.tostring()
|
aBc
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Overwrite substring at index 'n'
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a="abcdefghi"
b="DEF"
n=3
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a=a[:n]+b+a[n+len(b):]
|
abcDEFghi
|
Replace
|
Replace 1st instance of char 'X' with 'Y'
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a="XXXYYYZZZ"
|
a=a.replace('X','Y',1)
|
YXXYYYZZZ
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Replace all instances of char 'X' with 'Y'
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a="XXXYYYZZZ";
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a=a.replace('X','Y')
|
YYYYYYZZZ
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Replace 1st instance of substring 'abc' with 'XYZ'
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a="abcdefabc"
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a=a .replace("abc","XYZ",1)
|
XYZdefabc
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Replace all instances of substring 'abc' with 'XYZ'
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a="abcdefabc"
|
a=a.replace("abc","XYZ")
|
XYZdefXYZ
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Replace all instances of 'X','Y','Z' with 'A','B','C' respectively
|
a="XXXYYYZZZ";
|
a=a .replace('X' ,'A') .replace('Y' ,'B').replace('Z','C')
|
AAABBBCCC
|
Remove
|
Remove 1st instance of char 'X'
|
a="XXXYYYZZZ"
|
a=a.replace('X','',1)
|
XXYYYZZZ
|
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Remove all instances of char 'X'
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a="XXXYYYZZZ"
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a=a.replace('X','')
|
YYYZZZ
|
|
Remove 1st instance of substring 'abc'
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a="abcdefabc"
|
a=a.replace("abc","",1)
|
defabc
|
|
Remove all instances of substring 'abc'
|
a="abcdefabc"
|
a=a.replace("abc","")
|
def
|
|
Remove prefix 'abc.'
|
a="abc.abc.def"
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a=re.sub(r"^abc.","",a)
|
abc.def
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|
Remove suffix '.def'
|
a="abc.def.def"
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a=re.sub(r"\.def$","",a)
|
abc.def
|
Remove by index
|
Remove 1st char
|
a="abcdef";
|
a=a[1:]
|
bcdef
|
|
Remove last char
|
a="abcdefghi";
|
a=a[:-1]
|
abcdefgh
|
|
Remove char at index 'n'
|
a="abcdef";
n=3;
|
a=a[:n]+a[n+1:]
|
abcef
|
|
Remove chars in index range 'm' to 'n' (inclusive)
|
a="abcdef";
m=2;
n=4;
|
a=a[:m]+a[n+1:]
|
abf
|
|
Remove chars from index 'n' onwards (inclusive)
|
a="abcdefghi";
n=3;
|
a=a[:n]
|
abc
|
|
Remove chars up to index 'n' (inclusive)
|
a="abcdefghi";
n=3;
|
a=a[n+1:]
|
efghi
|
Trim
|
Trim leading white space
|
a=" abc def "
|
a=string.lstrip(a)
|
abc def
|
|
Trim trailing white space
|
a=" abc def "
|
a=string.rstrip(a)
|
abc def
|
|
Trim leading and trailing white space
|
a=" abc def "
|
a=string.strip(a)
|
abc def
|
|
Trim trailing carriage return
|
a="abcdef\n"
|
a=string.strip(a)
|
abcdef
|
Sort
|
Sort in ascending order
|
a="cafdeb";
|
am=map(None,a); am.sort(); a=string.join(am,"")
|
abcdef
|
|
Sort in descending order
|
a="cafdeb";
|
am=map(None,a); am.sort(); am.reverse(); a=string.join(am,"")
|
fedcba
|
|
Sort in custom order
|
a="cafdeb";
|
am=map(None,a); am.sort(comp); a=string.join(am,"")
|
fedcba
|
|
Reverse
|
a="abcdefghi";
|
aa=array('c',a); aa.reverse(); a=string.join(aa,"")
|
ihgfedcba
|
Convert case
|
Convert to lower case
|
a="ABCDEFGHI";
|
a=a.lower()
|
abcdefghi
|
|
Convert to upper case
|
a="abcdefghi";
|
a=a.upper()
|
ABCDEFGHI
|
|
Convert first char to lower case
|
a="ABCDEFGHI";
|
a=a[0].lower()+a[1:]
|
aBCDEFGHI
|
|
Convert first char to upper case
|
a="abcdefghi";
|
a=a.capitalize()
|
Abcdefghi
|
|
