re = /\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/mx
str = 'import pandas, os, sys'
# Print the match result
str.scan(re) do |match|
puts match.to_s
end
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 Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html