创建单行python pandas数据框 [英] Create single row python pandas dataframe
本文介绍了创建单行python pandas数据框的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想用一行创建一个python pandas DataFrame,以使用更多的pandas功能,例如转储到* .csv.
I want to create a python pandas DataFrame with a single row, to use further pandas functionality like dumping to *.csv.
我已经看到了类似以下代码的代码,但最终只能使用列结构,但数据为空
I have seen code like the following being used, but I only end up with the column structure, but empty data
import pandas as pd
df = pd.DataFrame()
df['A'] = 1
df['B'] = 1.23
df['C'] = "Hello"
df.columns = [['A','B','C']]
print df
Empty DataFrame
Columns: [A, B, C]
Index: []
虽然我知道还有其他方法(例如从字典中),但我想了解为什么这段代码对我不起作用!?这是版本问题吗? (使用pandas == 0.19.2)
While I know there are other ways to do it (like from a dictionary), I want to understand why this piece of code is not working for me!? Is this a version issue? (using pandas==0.19.2)
推荐答案
In [399]: df = pd.DataFrame(columns=list('ABC'))
In [400]: df.loc[0] = [1,1.23,'Hello']
In [401]: df
Out[401]:
A B C
0 1 1.23 Hello
或:
In [395]: df = pd.DataFrame([[1,1.23,'Hello']], columns=list('ABC'))
In [396]: df
Out[396]:
A B C
0 1 1.23 Hello
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