2022-05-23 00:16:32 +04:00

88 lines
2.2 KiB
Python

# Copyright 2018-2022 Streamlit Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""A bunch of useful code utilities."""
import re
def extract_args(line):
"""Parse argument strings from all outer parentheses in a line of code.
Parameters
----------
line : str
A line of code
Returns
-------
list of strings
Contents of the outer parentheses
Example
-------
>>> line = 'foo(bar, baz), "a", my(func)'
>>> extract_args(line)
['bar, baz', 'func']
"""
stack = 0
startIndex = None
results = []
for i, c in enumerate(line):
if c == "(":
if stack == 0:
startIndex = i + 1
stack += 1
elif c == ")":
stack -= 1
if stack == 0:
results.append(line[startIndex:i])
return results
def get_method_args_from_code(args, line):
"""Parse arguments from a stringified arguments list inside parentheses
Parameters
----------
args : list
A list where it's size matches the expected number of parsed arguments
line : str
Stringified line of code with method arguments inside parentheses
Returns
-------
list of strings
Parsed arguments
Example
-------
>>> line = 'foo(bar, baz, my(func, tion))'
>>>
>>> get_method_args_from_code(range(0, 3), line)
['bar', 'baz', 'my(func, tion)']
"""
line_args = extract_args(line)[0]
# Split arguments, https://stackoverflow.com/a/26634150
if len(args) > 1:
inputs = re.split(r",\s*(?![^(){}[\]]*\))", line_args)
assert len(inputs) == len(args), "Could not split arguments"
else:
inputs = [line_args]
return inputs