用整数作为键将dict写入csv

该函数将字典视为一个iterable,希望从中获取其他iterable(即行)。

如果迭代字典,则只会得到关键字:

for item in my_dict:
    print(item)

199934234
1999234234

相反,您需要一个包含行的iterable。您可以使用 my_dict.items() 为此:

print(my_dict.items())

dict_items([(199934234, 'val1'), (1999234234, 'val2')])

因此:

import csv

with open('my_file.csv', 'w', newline='') as csvfile:
    writer = csv.writer(csvfile)
    writer.writerows(my_dict.items())

# File content.
199934234,val1
1999234234,val2

尝试:

with open("output.csv", "w", newline="") as csvfile:
    writer = csv.writer(csvfile)
    for k, v in my_dict.items():
        writer.writerow([k, v])