The pandasDataFrame.rename()function is a quite versatile function used not only to rename column names but also row indices. The good thing about this function is that you can rename specific columns. The syntax to change column names using the rename function. # Syntax to change column name...
我们经常会使用分组聚合的功能,如果要为聚合分配新名称,可以使用name = (column, agg_method)方法: 代码语言:python 代码运行次数:0 运行 AI代码解释 import pandas as pd df = pd.DataFrame({"size": ["S", "S", "M", "L"], "price": [44, 29.99, 10, 19]}) df.groupby('size').agg({'pr...
Pandas DataFrame.rename() function is used to change the single column name, multiple columns, by index position, in place, with a list, with a dict, and renaming all columns, etc. We are often required to change the column name of the DataFrame before we perform any operations. In fact...
# 定义条件 condition = (df['column_name'] > 10) & (df['column_name'] < 20) 删除满足条件的行:使用drop()方法删除满足条件的行。需要设置axis=0参数表示按行删除。 代码语言:txt 复制 # 删除满足条件的行 df = df.drop(df[condition].index, axis=0) 查看结果:可以使用head()方法查看删除后的D...
print("New value at row 4, column 'B':", new_value)# 输出: New value at row 4, column 'B': 10# 获取Series中的值series_value = df.loc[5].at['B'] print("Value at row 5, column 'B':", series_value)# 输出: Value at row 5, column 'B': 4# 输出更新后的 DataFrameprint...
我们经常会使用分组聚合的功能,如果要为聚合分配新名称,可以使用name = (column, agg_method)方法: import pandas as pd df = pd.DataFrame({"size": ["S", "S", "M", "L"], "price": [44, 29.99, 10, 19]}) df.groupby('size').agg({'price': 'mean'}) # Assign name to the aggregat...
infer_objects() Change the dtype of the columns in the DataFrame info() Prints information about the DataFrame insert() Insert a column in the DataFrame interpolate() Replaces not-a-number values with the interpolated method isin() Returns True if each elements in the DataFrame is in the spe...
df = pd.DataFrame(data, columns=['Name','Age']) df 利用dict创建dataframe data = {'Name':['Alex','Bob','Clarke'],'Age':[10.,12.,13.]} df = pd.DataFrame(data) df data = {'Name':['Alex','Bob','Clarke'],'Age':[10.,12.,'NaN']}#长度需要匹配df = pd.DataFrame(data, ...
通过点选取数据,Series.index_name|DataFrame.column_name35 通过loc|iloc|at|iat|df.query()|truncate()选取数据35 操作38 赋值操作|apply()38 +-*/算术运算df['列'].add()|.sub()|mul()|.div()|.floordiv()|pow()39 ...
Name: 0, dtype: object Note: We could also use thelocindexer to update one or multiple cells by row/column label. The code below sets the value130the first three cells or thesalarycolumn. survey_df.loc[[0,1,2],'salary'] = 130 ...