错误分析：File "C:\Users\g\AppData\Local\Temp/ipykernel_8532/925264442.py", line 26 x=np.loadtxt(file,dtype=np.int,,delimiter=',',skiprows=1) ^ SyntaxError: invalid syntax

这个错误提示是因为在 `np.loadtxt` 函数调用中有多余的逗号，导致语法无效。应该把多余的逗号删去即可。

下面是修改后的代码：

import xlrd
import numpy as np

wb = xlrd.open_workbook("历年总人口.xls")
sheet = wb.sheet_by_index(0)

col_0 = sheet.col_values(0)[38:]
col_1 = sheet.col_values(1)[38:]
col_2 = sheet.col_values(2)[38:]
col_4 = sheet.col_values(4)[38:]

year = [int(c) for c in col_0]
total = [int(c) for c in col_1]
man = [int(c) for c in col_2]
woman = [int(c) for c in col_4]

m = len(year)

arr = np.array(year).reshape(m,1)
arr = np.insert(arr,1,values=total,axis=1)
arr = np.insert(arr,1,values=man,axis=1)
arr = np.insert(arr,1,values=woman,axis=1)

file='历年总人口.csv'
np.savetxt(file,arr,fmt='%i',delimiter=',',comments='',header='年份,年末总人口,男性人口,女性人口')

x = np.loadtxt(file,dtype=np.int,delimiter=',',skiprows=1)
print(x)