LibCST | concrete syntax tree parser and serializer library | Parser library

5.49.0 - 2021-01-07
5.48.0 - 2021-01-06
5.47.0 - 2021-01-05
5.46.0 - 2021-01-04
5.45.0 - 2021-01-04
5.44.0 - 2021-01-03
5.43.9 - 2021-01-02
5.43.8 - 2021-01-02
5.43.7 - 2021-01-02
5.43.6 - 2021-01-02
5.43.5 - 2021-01-01
5.43.4 - 2020-12-24
5.43.3 - 2  

4.57.1 - 2019-12-29
4.57.0 - 2019-12-28
4.56.3 - 2019-12-22
4.56.2 - 2019-12-21
4.56.1 - 2019-12-19
4.56.0 - 2019-12-18
4.55.4 - 2019-12-18
4.55.3 - 2019-12-18
4.55.2 - 2019-12-17
4.55.1 - 2019-12-16
4.55.0 - 2019-12-16
4.54.2 - 2019-12-16
4.54.1 - 2  

# String that LibCST should look for in code which indicates that the
# module is generated code.

generated_code_marker: '@generated'

# Command line and arguments for invoking a code formatter. Anything
# specified here must be capable o

import io
import os

# Imports the Google Cloud client library
from google.cloud import vision

# Instantiates a client
client = vision.ImageAnnotatorClient()

# The name of the image file to annotate
file_name = os.path.abspath('resources

PATTERN = "decorator< '@' 'patch' '(' [any] ')' any* >"

PATTERN = """
    decorator< '@' 'patch' '(' [any] ')' any* >
    | decorator< '@' dotted_name< 'mock' '.' 'patch' > '(' [any] ')' any* &

import libcst as cst

code_example = """
from ast import parse
threshold  =  1
print(threshold)
"""

class CodeVisitor(cst.CSTVisitor):
    def visit_Assign(self, node: cst.Assign) -> bool:
        print("--> NODE TREE: \n{}".format(

import ast

def find_definition(linenum):
    functions = {}
    with open('input.py') as file:
        tree = ast.parse(file.read())

        for item in ast.walk(tree):
            if isinstance(item, (ast.FunctionDef, ast.AsyncFunctionD

In [1]: import libcst as cst

In [2]: code = 'hi = 0'

In [3]: tree = cst.parse_module(code)

In [4]: print(tree)
Module(
    body=[
        SimpleStatementLine(
            body=[
                Assign(
                    targets=[