创建字典列表：python / pandas

Question

我从一个用 Pandas 读取的 Excel 导入。每一行是一个不同的人，列给出了 people_id 等值。

现在我实际上想将每个人放入一个字典，然后将每个字典放入一个列表。但不幸的是，我的循环总是返回同一个人，但在列表中出现了 19 次。错在哪里？

path = os.path.abspath('dataset_people.xlsx') # works as long as file is in same directory as this code. Excel-file must be closed.
excel = pandas.read_excel(path)# excel is now a variable which contains the files contet. 
#print(excel) #print whole content.

# set dictionary
people = {}

# set list
list_people = []

# loop dictionary
for index, row in excel.iterrows():
    add1 = row['people_id']
    add2 = row['timestamp']
    add3 = row['floor_departure']
    add4 = row['floor_destination']
    people['people_id'] = add1
    people['timestamp'] = add2
    people['floor_departure'] = add3
    people['floor_destination'] = add4

# loop list
for index, row in excel.iterrows():
    list_people.append(people)

print(list_people)

Answer 1

如果我正确理解了这个问题，您必须在完成某人的 dict 条目后，在第一个循环中附加到 list_people。在第一个循环中，您读取第一行，将有关此人的所有信息存储在该行中，然后传递到下一行，覆盖您刚刚阅读的行的 people dict 中的内容。所以最后你只在字典中存储了数据框中最后一个人的信息。

for index, row in excel.iterrows():
    add1 = row['people_id']
    add2 = row['timestamp']
    add3 = row['floor_departure']
    add4 = row['floor_destination']
    people['people_id'] = add1
    people['timestamp'] = add2
    people['floor_departure'] = add3
    people['floor_destination'] = add4
    list_people.append(people)

这样的循环应该可以完成您需要的工作。这样，每个人都在一个字典中，然后将其添加到列表中。如果这是您正在寻找的解决方案，我建议您调用字典 person 而不是 people，而是在列表中表示。