Converting from Unicode in Python

Question

How do strip I convert Unicode to strings?

df = pd.DataFrame ({'A':[u'Joe', u'Bill']})
test = df['A'] == 'Joe'

This works on converting columns full to Unicode to floats:

df['B'] = df['B'].astype(float)

But when I try:

df['A'] = df['A'].astype(str)

The output is:

0    J
1    B

Answer 1

Unicode是字符串，在那里不需要转换。