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Look at following code and please explain why the str.count('') method and len(str) function is giving two different outputs.
a=''
print(len(a))
print(a.count(''))
Output:
0
1
540
length method= len() => It's return number of element from value of variable. count method = count() =>It's return how many times appeared from value of variable which you are specified value. Because in "list1" which has total value inside is 4. So that's why it becomes output 4 by using len() method.
Count() is a Python built-in function that returns the number of times an object appears in a list. The count() method is one of Python's built-in functions. It returns the number of times a given value occurs in a string or a list, as the name implies.
The count() method returns the number of times a specified value appears in the string.
count method can do its looping at C speed, which is faster than an explicit Python loop.
str.count() counts non-overlapping occurrences of the substring:
Return the number of non-overlapping occurrences of substring sub.
There is exactly one such place where the substring '' occurs in the string '': right at the start. So the count should return 1.
Generally speaking, the empty string will match at all positions in a given string, including right at the start and end, so the count should always be the length plus 1:
>>> (' ' * 100).count('')
101
That's because empty strings are considered to exist between all the characters of a string; for a string length 2, there are 3 empty strings; one at the start, one between the two characters, and one at the end.
So yes, the results are different and they are entirely correct.
199
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