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Questions and Answers
The split method returns a list containing the ______ in the string.
words
By default, the split method uses ______ as a separator.
space
The process of breaking a string into tokens is known as ______.
tokenizing
In Python, you can use the ______ method to tokenize a string.
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The repetition operator that makes multiple copies of a string and joins them together is the ______ symbol.
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The method that returns true if the string ends with a substring is called ______.
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The method that returns the lowest index in the string where a substring is found is called ______.
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The method that returns a copy of the string with all instances of old replaced by new is called ______.
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The method returns true if the string ______ with substring.
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The find method returns the lowest index of the ______, or if the substring is not contained in the string, returns -1.
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The ______ method returns a copy of the string with all alphabetic letters converted to lowercase.
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The ______ method returns a copy of the string with all leading whitespace characters removed.
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The ______ method returns a copy of the string with all trailing whitespace characters removed.
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The ______ method returns a copy of the string with all alphabetic letters converted to uppercase.
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The ______ method checks if the string ends with substring.
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The ______ method returns a copy of the string with all leading and trailing whitespace characters removed.
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Study Notes
String Methods
- The
splitmethod returns a list containing the words in the string, using space as the default separator, but a different separator can be specified as an argument. - Tokenizing is the process of breaking a string into tokens, and in Python, it can be done using the
splitmethod.
Repetition Operator
- The
*symbol is a repetition operator when applied to a string and an integer, creating multiple copies of the original string.
String Methods (continued)
-
endswith(substring): returnsTrueif the string ends with the specified substring. -
find(substring): returns the lowest index in the string where the substring is found, or-1if not found. -
replace(old, new): returns a copy of the string with all instances ofoldreplaced bynew. -
startswith(substring): returnsTrueif the string starts with the specified substring.
Searching for Substrings
- Programs often need to search for substrings, and several methods can be used:
-
find(substring): searches for the substring within the string. -
startswith(substring): checks if the string starts with the substring. -
endswith(substring): checks if the string ends with the substring.
-
String Case Conversion
-
lower(): returns a copy of the string with all alphabetic letters converted to lowercase. -
upper(): returns a copy of the string with all alphabetic letters converted to uppercase.
Removing Whitespace
-
lstrip(): returns a copy of the string with all leading whitespace characters removed. -
lstrip(char): returns a copy of the string with all instances ofcharremoved from the beginning. -
rstrip(): returns a copy of the string with all trailing whitespace characters removed. -
rstrip(char): returns a copy of the string with all instances ofcharremoved from the end. -
strip(): returns a copy of the string with all leading and trailing whitespace characters removed. -
strip(char): returns a copy of the string with all instances ofcharremoved from the beginning and end.
String Comparison
- String comparisons are case-sensitive.
- Uppercase characters are distinguished from lowercase characters.
- The
lower()andupper()methods can be used to make case-insensitive string comparisons.
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Description
Learn about string tokens and the split method in Python, including how to separate substrings by a special character. Understand how to work with strings in Python.
