根据文件名生成熊猫列值

Question

I wish to populate three columns (day, week, year) in a pandas data frame.

The data is to be extracted from a filename which are in this format:

AAAA_DDWWYYYY.txt

where:

• AAAA = alpha characters
• DD = Day
• WW = Month
• YYYY = Year

For example:

NDVI_01012016.txt

is:

• Day = 01
• Week = 01
• Year = 2016

Answer 1

Assuming df is your dataframe::

df.ix[df.filename == 'NDVI_01012016.txt', 'Day'] = 1
df.ix[df.filename == 'NDVI_01012016.txt', 'Week'] = '01'
df.ix[df.filename == 'NDVI_01012016.txt', 'Year'] = '2016'