applymap() (elementwise):接受一个函数,它接受一个值并返回一个带有 CSS 属性值对的字符串。apply()(column-/ row- /table-wise): 接受一个函数,它接受一个 Series 或 DataFrame 并返回一个具有相同形状的 Series、DataFrame 或 numpy 数组,其中每个元素都是一个带有 CSS 属性的字符串-值对。此方法根据axi...
import pandas as pd def test(): # 读取Excel文件 df = pd.read_excel('测试数据.xlsx') # 插入列 df.insert(loc=2, column='爱好', value=None) # 保存修改后的DataFrame到新的Excel文件 df.to_excel('结果.xlsx', index=False) test() 3、插入多列 假设我需要在D列(班级)后面插入5列,表头名...
pandas使用to_excel()方法导出Excel文件。 常用参数: excel_writer:文件路径,不存在会自动生成 sheet_name:指定工作簿 index:True表示写入行索引,False表示不写入行索引 encoding:文件编码方式 >>> df.to_excel('test_out.xlsx', index=False, sheet_name='学生成绩') 图3 三、创建数据 1、创建Series数据 通过...
以一个名为data.xlsx的Excel文件为例,我们可以使用read_excel函数轻松读取数据: Plain Text 9 1 2 import pandas as pd 如果需要指定工作表或者只读取特定列,也可以方便地进行配置。例如: Plain Text 复制代码 9 1 df = pd.read_excel('data.xlsx', sheet_name='Sheet1', usecols=["Column1",...
# Write DataFrame to Excel file df.to_excel('Courses.xlsx') print(df) By default, Pandas creates an Excel file with the contents below. It exports column names, indexes, and data to a sheet namedSheet1. You can change the name of the sheet from Sheet1 to something that makes sense ...
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* If str, then indicates comma separated list of Excel column letters and column ranges (e.g. "A:E" or "A,C,E:F"). Ranges are inclusive of both sides. * If list of int, then indicates list of column numbers to be parsed. ...
na_values:scalar, str,list-like,ordict,defaultNoneAdditional stringstorecognizeasNA/NaN. Ifdictpassed, specific per-column NA values. Bydefaultthe following values are interpretedasNaN:'', '#N/A', '#N/A N/A', '#NA', '-1.#IND', '-1.#QNAN', '-NaN', '-nan', ...
单个字段连接# 依据key1 column合并,并打印res = pd.merge(left, right, on='key1')print(res)多字段连接# 依据key1和key2 column进行合并,并打印出四种结果['left', 'right','outer', 'inner']res = pd.merge(left, right, on=['key1', 'key2'], how='inner')print(res)res = pd.merge(le...
default 0Row (0-indexed) to use for the column labels of the parsedDataFrame. If a list of integers is passed those row positions willbe combined into a ``MultiIndex``. Use None if there is no header.names : array-like, default NoneList of column names to use. If file contains no ...