向空的 Pandas 数据框添加一行 [重复]

Posted 2023-03-16

【中文标题】向空的 Pandas 数据框添加一行 [重复]

【英文标题】：Adding a Row to an Empty Pandas Dataframe [duplicate]

【发布时间】：2020-10-13 22:35:52

【问题描述】：

我正在尝试解析我从网络上抓取的住房数据。对于每所房子，我将特征存储在一个列表中。我想将每个房子的特征（例如卧室、浴室、平方英尺等）放入同一 pandas 数据框中的一行。但是，当我尝试下面的代码时，我的数据框的标题出现了，但没有任何内容。我在这里错过了什么？

def processData(url):
    
    #Rest of function omitted as it is not relevant to the question at hand.
    
    entry = [location, price, beds, baths, sqft, lotSize, neighborhoodMed, dom, built, hs, 
          garage, neighborhood, hType, basementSize]

    df = pd.DataFrame(columns = ["Address", "Price", "Beds", "Baths", "SqFt", "LotSize", 
                                 "NeighborhoodMedian", "DOM", "Built", "HighSchool", "Garage", 
                                "Neighborhood", "Type", "BasementSize"])

    df.append(entry) #This line doesn't work
    
    return df

输出：

【问题讨论】：

您需要重新分配df=df.append(entry)

@ScottBoston 谢谢你的帮助，但现在我的内容是垂直的而不是水平的。

试试看，df.append(dict(zip(df.columns, entry)), ignore_index=True)

【参考方案1】：

只是猜测您的要求，但请尝试以下操作

import pandas as pd

location, price, beds, baths, sqft, lotSize, neighborhoodMed, dom, built, hs, garage, neighborhood, hType, basementSize = range(
    14)
entry = [
    location, price, beds, baths, sqft, lotSize, neighborhoodMed, dom, built,
    hs, garage, neighborhood, hType, basementSize
]

columns = [
    "Address", "Price", "Beds", "Baths", "SqFt", "LotSize",
    "NeighborhoodMedian", "DOM", "Built", "HighSchool", "Garage",
    "Neighborhood", "Type", "BasementSize"
]

df = pd.DataFrame(columns=columns)

df = df.append(
    dict(zip(columns, entry)), ignore_index=True)  #This line doesn't work

print(df)