Gain insights into Python by exploring basic to advanced concepts, including loops, classes, and GUIs with Tkinter. Delve into testing and become a productive Python programmer.

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In this course, you will get a comprehensive overview of Python. You will start by laying the foundation and learning the introductory topics like operators, conditional statements, functions, loops, assignment statements, and more. You will then move onto more advanced topics such as classes and inheritance, iterators, list comprehensions, and dictionaries. Along with this, you will also get to explore the concept of testing and take a look at how GUI applications can be designed using Tkinter, Python's standard GUI library. 

By the time you're done, you'll be able to hit the ground running and be equipped with the tools that will allow you to be productive in Python.

Python 3: From Beginner to Advanced

## Introduction to string methods

Here are some of the string methods available in the `string` module (in alphabetical order):

* `string.center(int)` returns a copy of `string` centered in a string of length `int`.

* `string.count(substring)` returns the number of non-overlapping occurrences of `substring` in `string`.
* `string.endswith(suffix)` returns `True` if `string` ends with `suffix`.
* `string.find(substring)` returns the index at the beginning of the first occurrence of `substring` in `string`, or it returns -1 if not found.
* `string.isalnum()` tests whether all characters are alphanumeric (letters or digits). It returns `True` if all characters are alphanumeric or `False` otherwise (including if the `string` is empty).
* `string.isalpha()` tests whether all characters are alphabetic. It returns `True` if all characters are alphabetic or `False` otherwise (including if the `string` is empty).
* `string.isdigit()` tests whether all characters are digits. It returns `True` if all characters are digits or `False` otherwise.
* `string.isidentifier()` returns `True` if `string` is a nonempty string consisting only of letters, digits, and/or underscores, and does not begin with a digit. It returns `False` if the string is empty, begins with a digit, or contains any other characters.
* `string.islower()` tests whether all letters in `string` are lowercase. It returns `True` if all characters are lowercase or `False` otherwise (including if the `string` is empty).
* `string.isprintable()` tests whether the `string` does not contain control characters. It returns `True` if all characters can be printed, or `False` otherwise.
* `string.isspace()` tests whether all characters are whitespace (spaces, tabs, newlines, and some Unicode characters). It returns `True` if all characters are whitespaces or `False` otherwise (including if the `string` is empty).
* `string.isupper()` tests whether all letters in `string` are uppercase. It returns `True` if all characters are uppercase or `False` otherwise (including if the `string` is empty).
* `string.ljust(int)` returns a copy of `string` left-justified in a field of length `int`.
* `string.lower()` returns a copy of `string` with all uppercase letters replaced by their lowercase equivalents.
* `string1.partition(string2)` returns a 3-tuple: (the part of `string1` before `string2`, `string2` itself, and the part after `string2`).
* `string1.replace(string2, string3)` returns a copy of `string1` with all occurrences of `string2` replaced with `string3`.
* `string.rjust(int)` returns a copy of the string right-justified in a field of length `int`.
* `string1.split(string2)` returns a list of the substrings of `string1` that are separated by `string2`. If `string2` is omitted, whitespace is used as the separator.
* `string.splitlines()` returns a list of the lines in `string`, discarding newlines.
* `string.startswith(prefix)` returns `True` if `string` starts with `prefix`.
* `string.strip()` returns a copy of `string` with all leading and trailing whitespace removed.
* `string.upper()` returns a copy of `string` with all lowercase letters replaced by their uppercase equivalents.
* `string.join()` returns a string by joining all the elements of a sequence/iterable separated by a string separator.
* `string.format()` formats the specified value(s) and inserts them in string’s placeholder(s).

**In addition**: A string may be treated as a list of characters, so all of the `list` methods can be applied to strings.

# Introduction to string methods

Here are some of the string methods available in the `string` module (in alphabetical order):

* `string.center(int)` returns a copy of `string` centered in a string of length `int`.

* `string.count(substring)` returns the number of non-overlapping occurrences of `substring` in `string`.
* `string.endswith(suffix)` returns `True` if `string` ends with `suffix`.
* `string.find(substring)` returns the index at the beginning of the first occurrence of `substring` in `string`, or it returns -1 if not found.
* `string.isalnum()` tests whether all characters are alphanumeric (letters or digits). It returns `True` if all characters are alphanumeric or `False` otherwise (including if the `string` is empty).
* `string.isalpha()` tests whether all characters are alphabetic. It returns `True` if all characters are alphabetic or `False` otherwise (including if the `string` is empty).
* `string.isdigit()` tests whether all characters are digits. It returns `True` if all characters are digits or `False` otherwise.
* `string.isidentifier()` returns `True` if `string` is a nonempty string consisting only of letters, digits, and/or underscores, and does not begin with a digit. It returns `False` if the string is empty, begins with a digit, or contains any other characters.
* `string.islower()` tests whether all letters in `string` are lowercase. It returns `True` if all characters are lowercase or `False` otherwise (including if the `string` is empty).
* `string.isprintable()` tests whether the `string` does not contain control characters. It returns `True` if all characters can be printed, or `False` otherwise.
* `string.isspace()` tests whether all characters are whitespace (spaces, tabs, newlines, and some Unicode characters). It returns `True` if all characters are whitespaces or `False` otherwise (including if the `string` is empty).
* `string.isupper()` tests whether all letters in `string` are uppercase. It returns `True` if all characters are uppercase or `False` otherwise (including if the `string` is empty).
* `string.ljust(int)` returns a copy of `string` left-justified in a field of length `int`.
* `string.lower()` returns a copy of `string` with all uppercase letters replaced by their lowercase equivalents.
* `string1.partition(string2)` returns a 3-tuple: (the part of `string1` before `string2`, `string2` itself, and the part after `string2`).
* `string1.replace(string2, string3)` returns a copy of `string1` with all occurrences of `string2` replaced with `string3`.
* `string.rjust(int)` returns a copy of the string right-justified in a field of length `int`.
* `string1.split(string2)` returns a list of the substrings of `string1` that are separated by `string2`. If `string2` is omitted, whitespace is used as the separator.
* `string.splitlines()` returns a list of the lines in `string`, discarding newlines.
* `string.startswith(prefix)` returns `True` if `string` starts with `prefix`.
* `string.strip()` returns a copy of `string` with all leading and trailing whitespace removed.
* `string.upper()` returns a copy of `string` with all lowercase letters replaced by their uppercase equivalents.
* `string.join()` returns a string by joining all the elements of a sequence/iterable separated by a string separator.
* `string.format()` formats the specified value(s) and inserts them in string’s placeholder(s).

**In addition**: A string may be treated as a list of characters, so all of the `list` methods can be applied to strings.

Learn about the different string methods available in Python.

Introduction

The Absolute Bare Minimum

Better Tools

Classes

Getting Fancy

Testing

Graphical User Interfaces

Modules

Appendix

I Guess We're Doing Python Now Exam

String Methods

Introduction to string methods