‘UnicodeDecodeError: ‘gbk‘ codec can‘t decode byte 0x80 in position 2: illegal multibyte sequence’

import matplotlib.pyplot as pltplt.rcParams['font.sans-serif'] = ['KaiTi']
with open(r'E:\pythoncoda\read\notebook.txt', encoding='utf-8') as file:# contents = file.read()# print(contents)#  逐行输出，需要把上面两行注释掉，否则不能输出# for line in file:#     print('line:', line)# 第二种成行输出方法contents = file.readlines()print(contents)
newList = []
for content in contents:newContent = content.replace('\n', '')money = newContent.split('：')[-1]newList.append(int(money))
print(newList)
x = [1, 2, 3, 4, 5, 6]
y = newList
plot = plt.plot(x, y, 'r', label='销售')
plt.xlabel('month')
plt.ylabel('money')
plt.savefig('销售额.png')
plt.legend()
plt.show()# 求平均值
sum0 = 0
for money in newList:sum0 += money
average = sum0 / len(newList)
print("average:", average)average2 = sum(newList)/len(newList)
print("average2:", average2)

import matplotlib.pyplot as plt
with open(r'E:\pythoncoda\read\notebook.txt') as file:

对txt文件进行读取，出现错误提示 ‘UnicodeDecodeError: 'gbk' codec can't decode byte 0x80 in position 2: illegal multibyte sequence’

解决方法:在读取文件代码处加上；encoding='utf-8'

再次运行就不会报错。

画图时遇到 “No handles with labels found to put in legend.”报错，翻译过来为没有找到标签的手柄，可以放在图例中。

在plot函数里加上，label=‘销售’。即可解决报错。

出现‘RuntimeWarning: Glyph 21806 missing from current font. font.set_text(s, 0, flags=flags)’
是因为没有设置字体，所以图例没有显示出来。

在开始代码模块加入‘matplotlib.rcParams['font.sans-serif'] = ['KaiTi']’即可解决。

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