It sounds like you want re.findall():

findall(pattern, string, flags=0)
    Return a list of all non-overlapping matches in the string.

    If one or more groups are present in the pattern, return a
    list of groups; this will be a list of tuples if the pattern
    has more than one group.

    Empty matches are included in the result.

As far as the actual regular expression for identifying email addresses goes... See this question.

Also, be careful using str as a variable name. This will hide the str built-in.

It sounds like you want re.findall():

findall(pattern, string, flags=0)
    Return a list of all non-overlapping matches in the string.

    If one or more groups are present in the pattern, return a
    list of groups; this will be a list of tuples if the pattern
    has more than one group.

    Empty matches are included in the result.

As far as the actual regular expression for identifying email addresses goes... See this question.

Also, be careful using str as a variable name. This will hide the str built-in.

It sounds like you want re.findall():

findall(pattern, string, flags=0)
    Return a list of all non-overlapping matches in the string.

    If one or more groups are present in the pattern, return a
    list of groups; this will be a list of tuples if the pattern
    has more than one group.

    Empty matches are included in the result.

Also, be careful using str as a variable name. This will hide the str built-in.

It sounds like you want re.findall():

findall(pattern, string, flags=0)
    Return a list of all non-overlapping matches in the string.

    If one or more groups are present in the pattern, return a
    list of groups; this will be a list of tuples if the pattern
    has more than one group.

    Empty matches are included in the result.

As far as the actual regular expression for identifying email addresses goes... See this question.

Also, be careful using str as a variable name. This will hide the str built-in.