Operator
2018-12-11 00:45:43
24
1. + - * / ** In addition to the power take the remainder% / / rounded
2. determine the value of a thing or another whether in whole
if ,,, not in ,,, if,,,in,,,
Example: Example:
a=(“b” “c”) a=(“b” “c”)
if“b”not in a if“b”in a
print(1) print(2)
else else
print(2) print(1)
Third, the magic
1.test.copitalize () first letter capitalized
2.test.casefold( )
test.lower () uppercase to lowercase
test.swapcase () becomes uppercase lowercase
test.upperl( )
3.test.center () represents the width, center
test.l just () Left
test.r just () right of abode
4.test.strip () on both sides
test.lstrip () left
test.rstrip () to remove the left and right sides of the blank, / n, / t, may be specified character
5.test.count () to find the sub-sequence number string
test.find () to find the position of the string sequence, may be provided range
test.index () values obtained in accordance with the position
6.test.endswith () to end ......
test.startswith () to begin ......
7.test.format (String placeholder = "sequence") format, instead of the string sequence placeholder
test.format-map ({: ""}) form Dictionary
8.str.maketrans( )
test.translate () in combination instead of replacing
9.test.replace () instead of new and old characters in character column column
10.test.expocndtabs () truncates the string
/ T Tab / n newline
11.test.isalnum () determining whether the presence of the string of letters and numbers
Whether test.isalpha () determines the presence of the string of letters and man
Whether 12.test.isdecimal () is determined with a digital string
test.isdigit () No. 1 and other support
test.isnumeric () supports digital capital
13.test.islower () determines whether the string lowercase
14.test.isprintable () to determine whether there is a string of characters not visible, you can not print
Whether 15.test.isspace () determine string are spaces, that is, the null character
16.test.istitle () to determine whether the title
17.test.title () to convert the string into the title
18.test.join () what is inserted into the string as: v = "a" .join ()
li.inse (position values) may be selected from the position of the insert
19.test.partition () first argument divided
test.rpartition () to the second argument divided
test.split () divided to each parameter, the parameter is not included
test.isplit () determines whether to split each of the parameters
test.splitlines () divided only in accordance with / n newline, true.false whether there newline
How many character string 20.len
The for loop format
for the variable name in a string
print (variable name)
Index: Refers to a string What is the first of several
Sections: a string of
The test ([0: 1])
21. Once the string to create can not be modified
By modifying or stitching, regenerates string
22.break end
contincle loop current
input wait for user input
23.li.extend () in the original Riga, you can also merge
li.append () in the original Riga
24.li.clear () Clear
25.li.copy () shallow copy, copy equivalent
() Between the conversion list, Ganso, character 26.li.tuple
27.li.pop () to delete the default mantissa and delete the value available
li.remove () to delete the specified
der delete
28.li.reverse () will reverse the current position
29.li, sort () to sort