Python Pandas 如果字符串以

Question

I am trying to write the following function:

def d (row):
    if df['name'].str.startswith('"'):
        return df['name'].str.replace("'","''")
    else:
        return df['name']
df['name2'] = df.apply(lambda row: d(row), axis=1)

I am trying to add a second apostrophe whenever a string has a single apostrophe within a contraction. this only appears when i have double quoted strings.

I continue to get a ' KeyError: ('name', occurred at index 0')

this only happens a few times in my dataset, but i need to replace "jack's place" with "jack''s place" so that i can inject this into a sql query.

Answer 1

Why can't you do a full replace:

df['name2'] = df['name'].str.replace('\'', '"')
print(df)

           name         name2
0           ABC           ABC
1           SDF           SDF
2  jack's place  jack"s place
3  jack's place  jack"s place
4  jack's place  jack"s place