Python dataframe从字符串中删除最后一个数字（如果是数字）

python数据帧

data = {'d':['AAA2', 'BB 2', 'C', 'DDD ', 'EEEEEEE)', 'FFF ()', np.nan, '123456']}
df = pd.DataFrame(data)

data = {'d':['AAA2', 'BB 2', 'C', 'DDD ', 'EEEEEEE)', 'FFF ()', np.nan, '123456'],
        'expected': ['AAA', 'BB', 'C', 'DDD', 'EEEEEEE)', 'FFF (', np.nan, '12345']}
df = pd.DataFrame(data)
df

如果是数字，我想删除最后一个字符

从当前数据帧

data = {'d':['AAA2', 'BB 2', 'C', 'DDD ', 'EEEEEEE)', 'FFF ()', np.nan, '123456']}
df = pd.DataFrame(data)

data = {'d':['AAA2', 'BB 2', 'C', 'DDD ', 'EEEEEEE)', 'FFF ()', np.nan, '123456'],
        'expected': ['AAA', 'BB', 'C', 'DDD', 'EEEEEEE)', 'FFF (', np.nan, '12345']}
df = pd.DataFrame(data)
df

创建新的数据帧

data = {'d':['AAA2', 'BB 2', 'C', 'DDD ', 'EEEEEEE)', 'FFF ()', np.nan, '123456']}
df = pd.DataFrame(data)

data = {'d':['AAA2', 'BB 2', 'C', 'DDD ', 'EEEEEEE)', 'FFF ()', np.nan, '123456'],
        'expected': ['AAA', 'BB', 'C', 'DDD', 'EEEEEEE)', 'FFF (', np.nan, '12345']}
df = pd.DataFrame(data)
df

---

ex

使用

.str.replace

：

df['d'] = df['d'].str.replace(r'(\d)$','',regex=True)

---

使用

.str.replace

：

df['d'] = df['d'].str.replace(r'(\d)$','',regex=True)