CODEWITHSUNDEEP
python
Huanyu
Huanyu

Reputation: 39

why some packages or functions in python are capitalized for the first letter, and some are not?

For example:

from urllib.request import urlopen, Request

is there any rule about the capitalization of the first letter?

Upvotes: 3

Views: 955

Answers (2)

bruno desthuilliers
bruno desthuilliers

Reputation: 77912

Most of the answer is in pep08 (python coding style guidelines) - basically, classes are spelled in CamelCase, everything else in lower_with_underscores.

But note that (for various reasons), this convention is not always respected in Python itself (builtins and stdlib):

  • quite a few classes are named in all_lower, notably the datetime, date, time and timedelta from the datetime package, all of the builtin types (type, property, int, float, str, list, tuple, dict, set, object etc)

  • the logging package uses mixedCase for most functions and methods (ie logging.getLogger() which should be logging.get_logger() etc)

For the builtin types, there's at least an historical reason: most of those names where initially bound to functions, not to classes (I'm talking python 1.5.x or even older). For what it's worth, quite a few of them are actually still documented as being functions when they are not...

Upvotes: 2

Basil Al-Barrak
Basil Al-Barrak

Reputation: 1

The best practices in python is to use small letter in the name of functions but, when dealing with classes we capitalize the first letter.

Upvotes: 0

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