# Maximum length of consecutive 1’s in a binary string in Python using Map function

We are given a binary string containing 1’s and 0’s. Find the maximum length of consecutive 1’s in it.

**Examples:**

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Input : str = '11000111101010111' Output : 4

We have an existing solution for this problem please refer to Maximum consecutive one’s (or zeros) in a binary array link. We can solve this problem within single line of code in Python. The approach is very simple,

- Separate all sub-strings of consecutive 1’s separated by zeros using split() method of string.
- Print maximum length of split sub-strings of 1’s.

## Python

`# Function to find Maximum length of consecutive 1's in a binary string` `def` `maxConsecutive1(` `input` `):` ` ` `# input.split('0') --> splits all sub-strings of consecutive 1's` ` ` `# separated by 0's, output will be like ['11','1111','1','1','111']` ` ` `# map(len,input.split('0')) --> map function maps len function on each` ` ` `# sub-string of consecutive 1's` ` ` `# max() returns maximum element from a list` ` ` `print` `max` `(` `map` `(` `len` `,` `input` `.split(` `'0'` `)))` `# Driver program` `if` `__name__ ` `=` `=` `"__main__"` `:` ` ` `input` `=` `'11000111101010111'` ` ` `maxConsecutive1(` `input` `)` |

**Output: **

4