import re
regex = re.compile(r"""
\s*
(?:
(?:^from\s+
( # Base (from (base) import ...)
(?:[a-zA-Z_][a-zA-Z_0-9]* # Variable name
(?:\.[a-zA-Z_][a-zA-Z_0-9]*)* # Attribute (.attr)
)
)\s+import\s+
)
|
(?:^import\s|,)\s*
)
( # Name of imported module (import (this))
(?:[a-zA-Z_][a-zA-Z_0-9]* # Variable name
(?:\.[a-zA-Z_][a-zA-Z_0-9]*)* # Attribute (.attr)
)
)
(?:
\s+as\s+
( # Variable module is imported into (import foo as bar)
(?:[a-zA-Z_][a-zA-Z_0-9]* # Variable name
(?:\.[a-zA-Z_][a-zA-Z_0-9]*)* # Attribute (.attr)
)
)
)?
\s*
(?=,|$) # Ensure there is another thing being imported or it is the end of string
""", flags=re.MULTILINE | re.VERBOSE)
test_str = "import pandas, os, sys"
matches = regex.finditer(test_str)
for match_num, match in enumerate(matches, start=1):
print(f"Match {match_num} was found at {match.start()}-{match.end()}: {match.group()}")
for group_num, group in enumerate(match.groups(), start=1):
print(f"Group {group_num} found at {match.start(group_num)}-{match.end(group_num)}: {group}")
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Python, please visit: https://docs.python.org/3/library/re.html