Python filter function filter () filter sequence instances using a custom function _python

Filter function:

The filter () function filters the sequence by using a custom function that filters a sequence, passes each item of the sequence to a custom filter function, and returns the result to be filtered. Finally, the filtered results are returned at once.

The filter () function has two parameters:

First, custom function name, required
The second, the column that needs to be filtered, is also necessary

DEMO

requirements, filtering more than 5 less than 10:

Copy Code code as follows:

# Coding=utf8
# defines a function greater than 5 less than 10
def guolvhanshu (num):
If Num>5 and num<10:
Return num

# define a sequence
Seq= (12,50,8,17,65,14,9,6,14,5)

# using the filter function
Result=filter (GUOLVHANSHU,SEQ)

# (8,9,6)
Print result

Execution results:

Copy Code code as follows:

(8, 9, 6)

Because the 8,9,6 is greater than 5 and less than 10, it is filtered down.