Readlines
readlines is an operation that reads all remaining lines from a file or stream and returns them as a collection of strings.
A Pythonic Adventure: From Python basics to a working web app
The Python file readlines method returns the lines read from a file as a list of strings.
- How it is used
- Loads file-based menu choices as a list for later program interaction.
- How deep it goes
- Shows the return type, newline characters, and a loop-based cleanup pattern, but not lower-level file internals.
- Examples
- Uses drinks.txt, flavors.txt, and toppings.txt to build cleaned menu lists.
- What you can do after
- Apply it via Python file objects to read line-based data and prepare it for menu selection.
Read how A Pythonic Adventure: From Python basics to a working web app explains readlines →
The Quick Python Book, Fourth Edition
readlines is a file-object method that reads all remaining lines from an open stream and returns them as a list.
- How it is used
- Reads file lines into a list for tasks such as counting lines, words, and characters.
- How deep it goes
- Defines the returned list and retained newlines, then compares memory use and alternatives; defers optional-argument details to reference documentation.
- Examples
- Shows line counting, a word-and-character counter, and a read-and-write example preserving line endings.
- What you can do after
- Apply it via Python file objects to count or reuse lines while recognizing when one-line-at-a-time processing is safer.
Read how The Quick Python Book, Fourth Edition explains readlines →
Related concepts
- listproduces · A list is an ordered collection of elements arranged in a sequence.
- list()produces · list() is Python’s built-in constructor that creates a new list from an iterable, or an empty list when called without arguments.
- writelinesequivalent to · writelines is a file-object method that writes strings from an iterable consecutively without automatically adding newline characters.
- read operationalternative to · A read operation retrieves data from a source, typically without changing the underlying data being read.
- readlinealternative to · Readline is an operation or API that reads the next line or line fragment from an input stream or file-like source.
These guides are generated from the text of Manning books by Manning's knowledge graph and link to the sections they draw on. The full books are available on liveBook and at manning.com.