'DataFrame' object has no attribute 'append' File "D:\chapter12\demo\code\123.py", line 24, in <module> hit_count_7 = hit_count_7.append([{'用户数': time}], ignore_index=True) AttributeError: 'DataFrame' object has no attribute 'append'

Based on the error message you provided, it seems that you are trying to use the `append()` method on a DataFrame object, but this method does not exist for DataFrames. Instead, you can use the `concat()` method to concatenate DataFrames vertically.

Here's an example of how you can use `concat()` to append a row to a DataFrame:

import pandas as pd

# create an empty DataFrame
df = pd.DataFrame(columns=['用户数'])

# append a row to the DataFrame
time = 10
new_row = pd.DataFrame({'用户数': [time]})
df = pd.concat([df, new_row], ignore_index=True)

# print the updated DataFrame
print(df)

This should create a new DataFrame with one row containing the value of `time` in the `用户数` column. You can modify this code to fit your specific use case.