Python string formatting and UUID

Question

I am attempting to read in CSV data and map it to the following XML structure. In my first attempt, I have used % operator for string formatting, which works.

import pandas as pd
import uuid
df = pd.read_csv('media.csv', sep=',')
def convert_row(row):
   return """<video>
    <videoType fileUID="%s" name="">
        <locationType></locationType>
        <type>%s</type>
        <format>%s</format>
        <year>%s</year>
    </videoType>
</video>""" % (row[0], row[1], row[2], row[3])


print '\n'.join(df.apply(convert_row, axis=1))

However, I am hoping to populate the fileUID="%s" with a generated uuid, that I can then reference elsewhere. I'm not able to get this to work.

I tried adding u = str(uuid.uuid4()) just before the return statement and update % (u, row[0], row[1], row[2], row[3])

I get a 'not all arguments converted during string formatting' error

So I attempted to use f-strings formatting

import pandas as pd
import uuid
df = pd.read_csv('media.csv', sep=',')
def convert_row(row):
   return f"""<video>
    <videoType fileUID="{u}" name="">
        <locationType></locationType>
        <type>{row[0]}</type>
        <format>{row[1]}</format>
        <year>{row[2]}</year>
    </videoType>
</video>"""


print '\n'.join(df.apply(convert_row, axis=1))

and get another error stating invalid syntax in regards to the closing """

I guess my questions are which string formatting style is the best option when dealing with UUID and what is wrong with my code? Plus, if I wish to reference the generated uuid in other generated xml structures - I will ultimately create an xml file with the multiple generated xml structure content.

Thank you for any assistance

Answer 1

To @deceze's point you were missing some formatting in your code shown.

I believe what your looking for is something like this?

Code

"""UUID Example."""
import pandas as pd
import uuid

df = pd.read_csv('media.csv', sep=',')


def convert_row(row):
    """Convert Row Example."""
    u = str(uuid.uuid4())
    return """<video>
    <videoType fileUID={} name=\"\">
        <locationType></locationType>
        <type>{}</type>
        <format>{}</format>
        <year>{}</year>
    </videoType>
</video>""".format(u, row[0], row[1], row[2], row[3])

print("\n".join(df.apply(convert_row, axis=1)))

Results

$ python3 uuid_testing.py 
<video>
    <videoType fileUID=d07ea048-a08f-444c-9182-7fff3a825dcc name="">
        <locationType></locationType>
        <type>2</type>
        <format>b</format>
        <year>f</year>
    </videoType>
</video>
<video>
    <videoType fileUID=4b058e99-457e-4b26-ac03-593c51e6cb1e name="">
        <locationType></locationType>
        <type>3</type>
        <format>c</format>
        <year>g</year>
    </videoType>
</video>
<video>
    <videoType fileUID=8d04f6e6-1b5b-4103-a42a-aaa9c45d7bc5 name="">
        <locationType></locationType>
        <type>4</type>
        <format>d</format>
        <year>h</year>
    </videoType>
</video>

Github: Code was added to my Repo.