在pandas中使用to_dict（）时，无法将列标题附加到数据框

Question

I have a key/value paired dict of (datetime/object) variables and am having trouble appending a header and dtypes to the data types.

I can make a dataframe with no column headers and dtype of object which is what I don't want. I'm trying to use the dtype and column parameters but am only being met with errors.

My code to create my dict:

for files_local in glob.glob(share_dr + '/**/*.csv', recursive=True):
    match = re.search(get_matches_regex, files_local)
    if match and match.group(0):
        d = datetime.datetime.strptime  # short form
        dict_of_files_local[d(match.group('fileDate'), '%Y%m%d_%H%M%S')] = files_local

My dict when looping through:

2019-02-07 09:11:39 C:\csv\myfile_20190207_091139_092739.csv
2019-02-08 03:08:11 C:\csv\myfile_20190208_030811_031734.csv

This all works, great, but when I try to add it to a dataframe using:

df = pd.DataFrame.from_dict(dict_of_files_local, orient='index', dtype=['datetime', 'object'], columns=['Timestamp', 'Filename'])

I'm getting the error:

TypeError: data type not understood

Why is this? I thought pandas was had great datetime parsing availability?

How can I solve this problem? Am still rather new to python/pandas BTW.

Thanks a lot !

Answer 1

I have managed to find a workaround, which is just by passing the dict.items() to the pd.DataFrame parameter.

My code below:

df = pd.DataFrame(dict_of_files_local.items(), columns=['Timestamp', 'Filename'])

Now outputs the following:

            Timestamp                           Filename
0 2019-02-07 09:11:39  C:\csv\myfile_20190207_091139_...
1 2019-02-08 03:08:11  C:\csv\myfile_20190208_030811_...