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Could size () have come with an. Len is a function to get the length of a collection. I know that python has a len() function that is used to determine the size of a string, but why is it not a method of the string object?

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From elements of programming interviews in phyton, page 37, this little program reorders an array of integers so that the even numbers appear first. The argument may be a sequence (such as a string, bytes, tuple, list, or range) or a collection. I found two ways to determine how many elements are in a variable… i always get the same values for len () and size ().

Row count of a dataframe:

Part of the reason for the len function vs using.__len__() or.len() is that python was intended to be a language that is easy to learn. Len(df), df.shape[0], or len(df.index) len(df) # 5 df.shape[0] # 5 len(df.index) # 5 it seems silly to compare the performance of constant time. __something__ attributes are special and usually more than meets the eye, and generally. It works by calling an object's __len__ method.

Wonka' is the longest full name in the column at 14 characters naming each. From the docs len(s) return the length (the number of items) of an object.

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