python pandas将字典转换为数据框

Question

i have two dictionaries as follows. I can convert the first to a dataframe , but the second gives error. Why?

d = {'id': ['CS2_056'], 'cost': [2], 'name': ['Tap']}
df = pd.DataFrame(d)
print(df)

raw_data1 = {
        'subject_id': 3,
        'first_name': 4, 
        'last_name': 7}
raw_data1
dfz = pd.DataFrame(raw_data1 )

Answer 1

This is happening because you are not passing an index, which is required when using scalar values. So to solve your issue you would do:

pd.DataFrame(raw_data1, index=[0])