Python - 用数字提取字符串

给定一个字符串列表，提取至少一位数的字符串。

Input : test_list = [‘gf4g’, ‘is’, ‘best’, ‘gee1ks’] 
Output : [‘gf4g’, ‘gee1ks’] 
Explanation : 4, 1 are respective digits in string.

Input : test_list = [‘gf4g’, ‘is’, ‘best’, ‘geeks’] 
Output : [‘gf4g’] 
Explanation : 4 is digit in string. 

方法 #1：使用列表理解+ any() + isdigit()

在此迭代中，每个字符串的迭代都是使用列表理解完成的，any() 和 isdigit() 用于检查至少一个数字的任务。

Python3

# Python3 code to demonstrate working of
# Extract Strings with a digit
# Using list comprehension + any() + isdigit()
 
# initializing list
test_list = ['gf4g', 'is', 'best', '4', 'gee1ks']
 
# printing original list
print("The original list is : " + str(test_list))
 
# checking if string contain any string using any()
res = [sub for sub in test_list if any(ele for ele in sub if ele.isdigit())]
 
# printing result
print("Strings with any digit : " + str(res))

输出：

The original list is : [‘gf4g’, ‘is’, ‘best’, ‘4’, ‘gee1ks’] 
Strings with any digit : [‘gf4g’, ‘4’, ‘gee1ks’]

方法#2：使用 any() + filter() + lambda

在这里，我们使用 lambda 和 filter() 执行过滤任务，其余保持不变。

蟒蛇3

# Python3 code to demonstrate working of
# Extract Strings with a digit
# Using any() + filter() + lambda
 
# initializing list
test_list = ['gf4g', 'is', 'best', '4', 'gee1ks']
 
# printing original list
print("The original list is : " + str(test_list))
 
# checking if string contain any string using any()
# filter() used to filter strings with digits
res = list(filter(lambda sub: any(
    ele for ele in sub if ele.isdigit()), test_list))
 
# printing result
print("Strings with any digit : " + str(res))

输出：

The original list is : [‘gf4g’, ‘is’, ‘best’, ‘4’, ‘gee1ks’] 
Strings with any digit : [‘gf4g’, ‘4’, ‘gee1ks’]