5155 method=method, 5156 copy=copy, 5157 level=level, 5158 fill_value=fill_value, 5159 limit=limit, 5160 tolerance=tolerance, 5161 ) File ~/work/pandas/pandas/pandas/core/generic.py:5610, in NDFrame.reindex(self, labels, index, columns, axis, method, copy, level, fill_value, limit...
import pandas as pd def test(): # 读取Excel文件 df = pd.read_excel('测试数据.xlsx') def modify_value(x): if x < 5: return '是' elif x < 10: return '否' else: return 'x' # 插入列 for col_num in range(4, 9): df.insert(loc=col_num, column=f'列{col_num-3}', value...
Assuming we have a DataFrame and need to query specific information based on certain conditions, for example, finding a column named “age” where the values are greater than a given number. We can achieve this using the Pandas’query()function. Let’s first create a sample DataFrame with so...
对数据进行透视操作:pivot_df = df.pivot_table(values='value_column', index='index_column', columns='column_column') 数据排序 按照单列的值进行升序排序:df.sort_values('column') 按照单列的值进行降序排序:df.sort_values('column', ascending=False) 按照多列的值进行排序:df.sort_values(['colum...
In [31]: df[["foo", "qux"]].columns.to_numpy() Out[31]: array([('foo', 'one'), ('foo', 'two'), ('qux', 'one'), ('qux', 'two')], dtype=object) # for a specific level In [32]: df[["foo", "qux"]].columns.get_level_values(0) Out[32]: Index(['foo', '...
# 安全绘图模板defsafe_plot(df,x_col,y_col):ifnotall(colindf.columnsforcolin[x_col,y_col]):print(f"缺少{x_col}或{y_col}列")returnvalid_data=df[[x_col,y_col]].dropna()iflen(valid_data)<2:print("有效数据不足")returnplt.figure(figsize=(12,6))sns.lineplot(data=valid_data,x=...
import pandas as pd# 文件路径filePath = r'C:\Users\Administrator\Desktop\Temp\1.xlsx'# 1.读取 excel(默认第 1 行为标题,行索引为 0,即:header=0)student = pd.read_excel(filePath)print(student.columns)# Index(['ID', 'Name', 'Age', 'Grade'], dtype='object') ...
row_mean = people[columns_name].mean(axis=1) row_sum = people[columns_name].sum(axis=1) total = "总分" average = "平均分" people[total] = row_sum people[average] = row_mean columns_name += [total, average] # 对列求平均值 ...
"""convert a dictionary into a DataFrame"""make the keys into columns"""df=pd.DataFrame(dic,index=[0]) 转换字典类型为DataFrame,并且key转换成行数据 代码语言:python 代码运行次数:0 复制 Cloud Studio代码运行 """make the keys into row index"""df=pd.DataFrame.from_dict(dic,orient='index'...
# 安全绘图模板defsafe_plot(df,x_col,y_col):ifnotall(colindf.columnsforcolin[x_col,y_col]):print(f"缺少{x_col}或{y_col}列")returnvalid_data=df[[x_col,y_col]].dropna()iflen(valid_data)<2:print("有效数据不足")returnplt.figure(figsize=(12,6))sns.lineplot(data=valid_data,x=...