Review Python anonymous function built-in functions

Lamba

Add:

Example:

The reduce usage in the previous example:

Built-in functions

, there are 137 of functions, classes, etc.

The first letter of the class is capitalized

To view the methods of a function or class:

Common built-in functions:

1. Return the absolute value of a number

To view the built-in function methods:

So:

2. Maximum minimum value of the list

To take a size value built-in function method:

To compare multiple parameters:

Compare Number Size:

Common built-in functions

Len () function

strings, tuples, lists, dictionaries are all possible. A bit for the dictionary example:

Divmod () built-in functions:

As can be seen from the description, the function is to return two numbers of quotient and remainder.

POW () built-in function:

When the two parameters, equal to the y of X, when three parameters, equal to the X y-side and Z to take the remainder

Example:

Round () built-in functions:

Example:

Callable () built-in functions:

To determine whether this object is callable or not.

Example:

Type () built-in functions:

Isinstance () built-in functions:

Returns a Boolean value

Example:

Previously defined functions for L and S:

and type do not need to be located only:

When judging a class, use isinstance to better judge it.

CMP () built-in functions:

Compare strings:

Comparisons are by character, not by length.

Range () and xrange () have seen these two before.

Type conversions, built-in functions:

Int ()

Example:

Long ()

Float ()

Complex ()

Transformed into a plural

STR ()

List ()

Type ()

Hex ()

Returns a 16 binary string

Eval ()

Restore 16 binary to 10 binary

Oct () converts 10 binary to 8 binary

Do your own research.

Chr () built-in function

The character that is returned is the corresponding ASCII code.

Ord () built-in functions

About the built-in functions for string processing (that is, methods):

Str.capitalize ()

View methods

Method Description:

Returns a string in which the first letter of the string is capitalized.

Example:

Str.replace ()

Description: Replace string

Str.split ()

Cut a string into a list

Str.join ()

String module

Import Sting Module

Many ways

Print all lowercase letters

Print all uppercase letters

Capitalize the first letter of the string

Replace string

Sequence processing functions:

Filter ()

Define function Name:

After the function is processed:

Zip ()

When the length of the third list differs from the first two, the shortest one is taken.

Map ()

Two lists used:

Reduce ()

Fileter + anonymous function

Map + anonymous functions

Reduce + anonymous functions

List expressions (list overrides)

Example:

Review Python anonymous function built-in functions