module 'plotly' has no attribute 'bar'为什么呢？

import csv
name='midterm.csv'
with open(name,"r") as file_object:
    reader=csv.reader(file_object)
    header=next(reader)
    rows=[row[1] for row in reader]
def criteria(score):
    if score <= 100 and score >= 90:
        return'A'
    elif score < 90 and score >= 80:
        return'B'
    elif score < 80 and score >= 70:
        return'C'
    elif score < 70 and score >= 60:
        return'D'
    elif score < 60:
        return'F'
pi_string=[]
for message in rows:
    pi_string.append(criteria(float(message)))
first_number=[pi_string.count('A'),pi_string.count('B'),pi_string.count('C'),pi_string.count('D'),pi_string.count('F')]
import plotly
hist=plotly.bar()
hist.x_labels=['A','B','C','D','F']
hist.answer('score',first_number)
hist.render_to_file('midterm1.svg')
    

把你的 import plotly  改成下面这个


import plotly.plotly
import plotly.graph_objs as pg