python使用正则表达式抽取字符串中最大数值数字

Posted 2021-06-29 Data+Science+Insight

python使用正则表达式抽取字符串中最大数值数字

 

 

#python使用正则表达式抽取字符串中最大数值数字

# Function to extract maximum numeric value from
# a given string
import re

def extractMax(input):

	# get a list of all numbers separated by
	# lower case characters
	# \\d+ is a regular expression which means
	# one or more digit
	# output will be like [\'100\',\'564\',\'365\']
	numbers = re.findall(\'\\d+\',input)
	print(numbers)
    
	# now we need to convert each number into integer
	# int(string) converts string into integer
	# we will map int() function onto all elements
	# of numbers list
	numbers = map(int,numbers)
	print(max(numbers))

# Driver program
if __name__ == "__main__":
	input = \'33oktest999fine666\'
	extractMax(input)