fromstr

"fromstr" is a Python function that is part of the built-in "ast" module, which stands for Abstract Syntax Trees. The function is used to parse a string containing Python source code and convert it into an abstract syntax tree (AST). This AST is a tree representation of the abstract syntactic structure of the source code, which can be used for various purposes such as code analysis, transformation, and optimization.

The "fromstr" function takes two arguments: the first is the string containing the Python source code, and the second is the filename to be used in error messages. If the filename is not provided, it defaults to "<unknown>". The function returns an AST object representing the parsed source code.

Here is an example of how to use the "fromstr" function:

import ast

source_code = "print('Hello, World!')"

tree = ast.fromstr(source_code, filename="example.py")

print(ast.dump(tree, indent=4))

This will output the AST representation of the source code, which can be further analyzed or manipulated as needed.

The "fromstr" function is particularly useful for tools that need to process Python code dynamically, such as linters, code formatters, and static analysis tools. By converting source code into an AST, these tools can more easily understand and manipulate the code's structure.