python中如何读取excel某列数据？

一、python读取excel某列数据

import xlrd

worksheet = xlrd.open_workbook('E:Crawl000002.xls')

sheet_names= worksheet.sheet_names()

print(sheet_names)

for sheet_name in sheet_names:

sheet = worksheet.sheet_by_name(sheet_name)

rows = sheet.nrows # 获取行数

cols = sheet.ncols # 获取列数，尽管没用到

all_content = []

cols = sheet.col_values(3) # 获取第二列内容， 数据格式为此数据的原有格式(原：字符串，读取：字符串; 原：浮点数， 读取：浮点数)

print(cols)

print(cols[3])

print(type(cols[3])) #查看数据类型

输出结果为

['Sheet1']

['', '', '-72.20', '248.84', '-32.67', '156.93', '-49.58', '59.36', '']

248.84

二、将读取的数据变为浮点数

import xlrd

worksheet = xlrd.open_workbook('E:Crawl000002.xls')

sheet_names= worksheet.sheet_names()

print(sheet_names)

for sheet_name in sheet_names:

sheet = worksheet.sheet_by_name(sheet_name)

rows = sheet.nrows # 获取行数

cols = sheet.ncols # 获取列数，尽管没用到

all_content = []

for i in range(rows) :

cell = sheet.cell_value(i, 3) # 取第二列数据

try:

cell = float(cell) # 转换为浮点数

all_content.append(cell)

except ValueError:

pass

print(all_content)

print(all_content[3])

print(type(all_content[3]))