python常用函数

1. String Functions 字符串函数

join -- joins a list of strings with anotherstring as a separator.

replace -- replaces onesubstring in a string with another.

startswith and endswith -- determineif there is a substring at the start and end of a string,respectively.

lower/upper -- to change the case of a string

split -- the opposite of join, turning a stringwith a certain separator into a list.

some examples:

2. Numeric Functions 数值函数

max -- find the maximum number in a list

min -- find the minimum number in a list

abs -- find the distance of a number from zero (its absolute value)

round --to round a number to a certain number of decimal places.

sum -- caculate the total of a list

some examples:

3. List Functions 列表函数

Often used in conditional statements.

all/any -- take a list as an argument,return True if all/any arguments evaluate to True.

enumerate -- can be used to iterate through the values and indices of a list simultaneously.

some examples: