如何在 Python 中定义数据框？
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How do I define a Dataframe in Python?
提问by Chase Kregor
I am doing some work in a jupyter notebook using python and pandas and am getting a weird error message and would really appreciate the help. The error I am receiving is "NameError: name 'DataFrame' is not defined"
我正在使用 python 和 Pandas 在 jupyter 笔记本中做一些工作，并收到一条奇怪的错误消息，非常感谢您的帮助。我收到的错误是“NameError: name 'DataFrame' is not defined”
import pandas as pd
d = {'name': ['Braund', 'Cummings', 'Heikkinen', 'Allen'],
'age': [22,38,26,35],
'fare': [7.25, 71.83, 0 , 8.05],
'survived?': [False, True, True, False]}
df = DataFrame(d)
print(df)
回答by mikkokotila
The below code works:
以下代码有效：
import pandas as pd
d = {'name': ['Braund', 'Cummings', 'Heikkinen', 'Allen'],
'age': [22,38,26,35],
'fare': [7.25, 71.83, 0 , 8.05],
'survived?': [False, True, True, False]}
df = pd.DataFrame(d)
print(df)
Instead of:
代替：
DataFrame(d)
You have to do:
你必须要做：
pd.DataFrame(d)
Because you've imported pandas as 'pd'.
因为您已将熊猫导入为“pd”。
You can achieve the same end much better by:
您可以通过以下方式更好地达到相同的目的：
df = pd.DataFrame({'name': ['Braund', 'Cummings', 'Heikkinen', 'Allen'],
'age': [22,38,26,35],
'fare': [7.25, 71.83, 0 , 8.05],
'survived': [False, True, True, False]})
I removed the '?' from the 'survived' feature as it's not a good idea to have special characters in your feature names.
我删除了“？” 来自“幸存”功能，因为在功能名称中包含特殊字符不是一个好主意。
回答by RonaldB
The error is not weird. Adding following statement at the top solves the problem:
错误并不奇怪。在顶部添加以下语句可以解决问题：
from pandas import DataFrame
