#!/usr/bin/env python
# coding: utf-8

# #Advanced Strings
# String objects have a variety of methods we can use to save time and add functionality. Lets explore some of them in this lecture:

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s = 'hello world'


# ##Changing case
# We can use methods to capitalize the first word of a string, change cases to upper and lower case strings.

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# Capitalize first word in string
s.capitalize()


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s.upper()


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s.lower()


# ## Location and Counting

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s.count('o')


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s.find('o')


# ##Formatting
# The center() method allows you to place your string 'centered' between a provided string with a certain length. Personally, I've never actually used this in code as it seems pretty esoteric...

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s.center(20,'z')


# expandtabs() will expand tab notations \t into spaces:

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'hello\thi'.expandtabs()


# ## is check methods
# These various methods below check it the string is some case. Lets explore them:

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s = 'hello'


# isalnum() will return True if all characters in S are alphanumeric

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s.isalnum()


# isalpha() wil return True if all characters in S are alphabetic

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s.isalpha()


# islower() will return True if all cased characters in S are lowercase and there is
# at least one cased character in S, False otherwise.

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s.islower()


# isspace() will return True if all characters in S are whitespace.

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s.isspace()


# istitle() will return True if S is a title cased string and there is at least one character in S, i.e. uppercase characters may only follow uncased characters and lowercase characters only cased ones. Return False otherwise.

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s.istitle()


# isupper() will return True if all cased characters in S are uppercase and there is
# at least one cased character in S, False otherwise.

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s.isupper()


# Another method is endswith() which is essentially the same as a boolean check on s[-1]

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s.endswith('o')


# ## Built-in Reg. Expressions
# Strings have some built-in methods that can resemble regular expression operations.
# We can use split() to split the string at a certain element and return a list of the result.
# We can use partition to return a tuple that includes the separator (the first occurrence) and the first half and the end half.

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s.split('e')


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s.partition('e')


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s


# **Great! You should now feel comfortable using the variety of methods that are built-in string objects!**