NameError：名称“Jan”未定义答案

【问题标题】：NameError: name 'Jan' is not definedNameError：名称“Jan”未定义
【发布时间】：2020-07-05 20:39:45
【问题描述】：

当我尝试运行代码时，我不断收到同样的错误消息 NameError: name 'Jan' is not defined 有人可以告诉我如何解决这个问题

def main():
    # imports ability to read text files
    import csv
times=[1,273,93,59,266,128,2,41,110,315,43,263,3,78,649,620,538,502,4,456,648,618,537,501,5,238,156,160,310,127,6,768,647,616,534,459,7,6785,646,614,533,458,8,567,645,613,531,457,9,700,644,612,530,457,10,678,643,610,529,456,11,78,642,609,527,455,12,659,641,608,526,454,13,6543,640,606,525,453,14,567,639,605, 524,453,15,533,638,604,522,452,16,246,637,602,521,451,17,5,636,601,520,450,18,90,635,600,519,450,19,7,634,558,517,449]
    dates = [Jan,Feb,March,April,May]
     
    raceTimes = (input("PLease enter a time you would like to search for:"))
    found = False
    
    # open text file
    with open("sun_data.csv") as csvfile:
        readCSV = csv.reader(csvfile, delimiter=',')
        
        # reads the text file
        for row in readCSV:
        # comparing values in text file with the user-entered time
              found = True
        for i in range(len(years)):
            if years[i] == x:
              found = True
            print(str(x) + " was found at position " + str(i))
            break
        if not found:
            print("I'm sorry, there is no race scheduled at that time.")
    # Close input file
    csvfile.close()
    
main()

【问题讨论】：

Jan 是一个名为 Jan 的变量。"Jan"（引用）是一个字符串。
这是否意味着我需要在 Jan 或括号中添加引号

标签： python nameerror

【解决方案1】：

您可能打算将日期存储为字符串？

如果是这样改变

dates = [Jan,Feb,March,April,May]

到

dates = ['Jan','Feb','March','April','May']

【讨论】：

【解决方案2】：

你得到NameError 因为Jan 确实没有定义。我相信您希望月份成为字符串：

dates = ['Jan','Feb','March','April','May']

【讨论】：

【解决方案3】：

我猜你尝试输入数组“日期”的项目。看起来项目应该是需要将它们设置在引号中的字符串。

日期 = ["一月","二月","三月","四月","五月"]

https://www.w3schools.com/python/python_arrays.asp

【讨论】：