import pandas as pd import os csv_folder_path = r'D:\pythonProject\csv\N' csv_folder_name = os.path.basename(os.path.normpath(csv_folder_path)) last_char = csv_folder_name[-1] csv_files = [os.path.join(csv_folder_path, f) for f in os.listdir(csv_folder_path) if f.endswith('.csv')] dfs = [] for csv_file in csv_files: df = pd.read_csv(csv_file, header=None) dfs.append(df) last_file_content = pd.read_csv(csv_files[-1], header=None) wave = [] form = [] records = dfs for record in records: wave = record form = last_char # print(wave) # print(form) print(records)将此段代码改写成上述程序

使用Python(pandas库)处理csv数据

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csv_file.rar_csv_csv文件_python_python 读写 excel_python处理csv数据

Python作为一种强大的脚本语言，内置了处理CSV文件的强大工具，如csv模块和pandas库，使得读取、写入以及处理CSV数据变得非常便捷。下面将详细探讨Python在读写CSV文件以及处理Excel数据方面的知识点。 1. ...

import os import pandas as pd # 设置文件夹路径 folder_path = 'path/to/folder' # 获取文件夹中的文件列表 file_list = os.listdir(folder_path) # 遍历文件列表，找到您需要的子文件夹 for file_name in file_list: subfolder_path = os.path.join(folder_path, file_name) if os.path.isdir(subfolder_path): # 进入子文件夹 os.chdir(subfolder_path) # 获取子文件夹中的.csv文件列表 csv_list = [f for f in os.listdir(subfolder_path) if f.endswith('.csv')] # 读取.csv文件 for csv_file in csv_list: df = pd.read_csv(csv_file) # 处理.csv文件 # ...在此基础上读取.csv文件名的最后一个字符作为输出

python output = csv_file[-5] # 假设.csv文件名的最后一个字符是数字或字母，使用索引-5获取它 print(output) # 输出该字符请注意，这仅适用于.csv文件名的最后一个字符是数字或字母的情况。如果文件名的...

import pandas as pd import networkx as nx import os from multiprocessing import Pool def process_csv(csv_path): df = pd.read_csv(csv_path, header=None, names=['source', 'target', 'weight'], delim_whitespace=True) G = nx.Graph() for index, row in df.iterrows(): G.add_edge(row['source'], row['target'], weight=row['weight']) dist_matrix = dict(nx.all_pairs_dijkstra_path_length(G)) with open(os.path.splitext(csv_path)[0] + '.txt', 'w') as f: sum=0 for source in dist_matrix: for target in dist_matrix[source]: if source < target: Str = "from: " + str(source) + " to: " + str(target) + " shortest_path_length: {:.2f}".format(dist_matrix[source][target]) f.write(Str + '\n') sum+=1/dist_matrix[source][target] N = G.number_of_nodes() ret='E(G)='+str(sum/(N*(N-1))) print(ret) f.write(ret + '\n') if name == 'main': folder_path = r'D:\2012POI\大连市2012_网络' csv_files = [os.path.join(folder_path, f) for f in os.listdir(folder_path) if f.endswith('.csv')] pool = Pool() pool.map(process_csv, csv_files) pool.close() pool.join()，帮我解决结果出现E(G)=inf的问题，并给出完整代码

folder_path = r'D:\2012POI\大连市2012_网络' csv_files = [os.path.join(folder_path, f) for f in os.listdir(folder_path) if f.endswith('.csv')] pool = Pool() pool.map(process_csv, csv_files) pool....

import pandas as pd import os from sklearn.model_selection import train_test_split from sklearn.ensemble import RandomForestClassifier from sklearn.metrics import accuracy_score import joblib # 读取.csv文件 folder_path = r'D:\pythonProject\csv' file_list = os.listdir(folder_path) X_list = [] y_list = [] for file_name in file_list: subfolder_path = os.path.join(folder_path, file_name) if os.path.isdir(subfolder_path): # 进入子文件夹 os.chdir(subfolder_path) # 获取子文件夹中的.csv文件列表 csv_list = [f for f in os.listdir(subfolder_path) if f.endswith('.csv')] # 读取.csv文件 dfs = [] for csv_file in csv_list: df = pd.read_csv(csv_file, header=None) dfs.append(df) csv_folder_name = os.path.basename(subfolder_path) last_char = csv_folder_name[-1] wave = [0]256 # form = [] records = dfs beat = [0]len(records) i = 0 for wave in records: form = last_char # print(wave) # print(form) # beat[i] = [wave, form] X = wave y = form X_list.append(X) y_list.append(y) # print('beat[{}] ='.format(i), beat[i]) # print('len(beat[{}]) ='.format(i), len(beat[i])) i = i + 1 # print(X_list) # print(y_list) # 划分特征与标签 X = X_list y = y_list # 将数据集拆分为训练集和测试集 X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=42) # 构造随机森林模型 model = RandomForestClassifier(n_estimators=10000, random_state=42) # 训练模型 model.fit(X_train, y_train) # 在测试集上评估模型的性能 y_pred = model.predict(X_test) accuracy = accuracy_score(y_test, y_pred) print("Accuracy:", accuracy)怎么改

import numpy as np X = np.array(X_list) y = np.array(y_list) 另外，建议在读取 csv 文件时，设置 header=None 参数，以便读取不包含表头的 csv 文件。如果 csv 文件中包含表头，可以将该参数设置为 ...

import os import pandas as pd import time while True: start = time.perf_counter() def get_txt_files(folder_path): files = [] try: for root, dirs, filenames in os.walk(folder_path): for filename in filenames: if filename.endswith(".txt"): files.append(os.path.abspath(os.path.join(root, filename))) except Exception as e: print("Error: {}".format(e)) return files def combine_txt_files(txt_files): content = "" try: for txt_file in txt_files: with open(txt_file, "r") as f: content += f.read() except Exception as e: print("Error: {}".format(e)) return content def write_combined_content_to_file(content, file_path): try: with open(file_path, "w") as f: f.write(content) except Exception as e: print("Error: {}".format(e)) def txt_to_excel(txt_file, excel_file): try: df = pd.read_csv(txt_file, delimiter="\t", header=None) df.to_excel(excel_file, index=False, header=None) except Exception as e: print("Error: {}".format(e)) if name=="main": folder_path="Z:\看板v2" txt_files=get_txt_files(folder_path) combined_content=combine_txt_files(txt_files) combined_file_path="D:\\測試log\\TXT合1并.txt" write_combined_content_to_file(combined_content,combined_file_path) excel_file_path="D:\\測試log\\123.xlsx" txt_to_excel(combined_file_path,excel_file_path) end = time.perf_counter() print('運行時間為:{}秒'.format(end-start)) time.sleep(30)

这是一段 Python 代码，主要功能是将指定文件夹中的所有 .txt 文件合并为一个文件，并将合并后的内容转换为 Excel 文件。首先使用 os.walk 函数获取指定文件夹中所有的 .txt 文件路径，然后使用 open 函数读取...

import csv import os import pandas as pd # 源文件夹路径 source_folder = "E:/lexin/output" # 新csv文件夹路径 output_folder = "E:/lexin/output2" # 获取源文件夹中的所有csv文件 csv_files = [f for f in os.listdir(source_folder) if f.endswith('.csv')] # 创建新的csv文件 output_files = [] with open(os.path.join(output_folder, "output.csv"), 'w') as output_file: output_files.append(csv.writer(output_file)) for i in range(1, len(csv_files)): output_file_path = os.path.join(output_folder, f"output{i}.csv") with open(output_file_path, 'w') as new_output_file: output_files.append(csv.writer(new_output_file)) # 遍历每个csv文件 for csv_file in csv_files: with open(os.path.join(source_folder, csv_file), 'r') as f: reader = csv.reader(f) # 遍历每行数据 for i, row in enumerate(reader): # 将第i行写入对应的新csv文件 with open(os.path.join(output_folder, f"output{i}.csv"), 'a', newline='') as out_file:#newline=''作用：避免出现空行。 writer = csv.writer(out_file) writer.writerow(row)运行这段代码，要想将输出的csv文件以文件中第5第6列第一行数据为文件名，怎么修改

with open(os.path.join(source_folder, csv_file), 'r') as f: reader = csv.reader(f) # 获取第5列和第6列的数据作为文件名 file_name = f"{reader[0][4]}_{reader[0][5]}.csv" output_file_path = os.path....

import os from bs4 import BeautifulSoup import re import csv import pandas as pd # 指定文件夹路径 folder_path = "C:/Users/test/Desktop/DIDItest" # 正则表达式模式 pattern = r'<body>(.?)<\/body>' # 创建CSV文件并写入表头 # CSV文件路径 csv_file = 'path/to/your/csv/file.csv' csv_file = "output.csv" # 遍历文件夹中的所有文件 for root, dirs, files in os.walk(folder_path): for file in files: # 读取html文件 file_path = os.path.join(root, file) with open(file_path, "r", encoding="utf-8-sig") as f: html_code = f.read() # 创建BeautifulSoup对象 soup = BeautifulSoup(html_code, 'html.parser') # 使用正则表达式匹配<body>标签内的数据 body_data = re.findall(pattern, html_code, re.DOTALL) # 剔除和() body_data = body_data[0].replace("", "").replace("()", "") # # 使用正则表达式提取talk_id、时间、发送者ID和接收者ID matches2 = re.findall(r'(?:中发言|发送)\s(.?)\s(?:音频 :|图片 :)?(?:\[([^\]]+)\])?', body_data) for match in matches2: # 提取链接地址 file_text = match[1] matches = re.findall(r'"([^"]*)"', file_text) if matches: file_name = matches[0] else: file_name = "No matches found." # print(file_name) # 替换字符 file_name = file_name.replace('No matches found.','') # 将提取的数据加载到DataFrame中 df_extracted = pd.DataFrame(file_name) # 读取原有的CSV文件 df_original = pd.read_csv(csv_file) print("---导入完成-----")

import pandas as pd # 指定文件夹路径 folder_path = "C:/Users/test/Desktop/DIDItest" # 正则表达式模式 pattern = r'(.*?)<\/body>' # 创建CSV文件并写入表头 csv_file = "output.csv" header = ['File Name'...

import pandas as pd df=pd.read_csv('H:/analysis_results/root_global_results_HN.csv') group_data=df.groupby(df['folder'].str[:-2]) #计算品种的平均值和标准差 #folder=df['folder'].str.split('_').str[0] #mean=group_data.mean() #std=group_data.std() #print('mean:',round(mean,3)) #print('std:',round(std,3)) result=group_data.agg({'volume':['mean','std'], 'convex_volume':['mean','std'], 'surface_area':['mean','std'], 'length':['mean','std'], 'max_width':['mean','std'], 'max_depth':['mean','std']} ) #df = result.reset_index(inplace=True) # 将索引列转换为普通列result.reset_index(inplace=True) #result.columns = ['_'.join(col).strip() for col in result.columns.values] result.columns = result.columns.map(lambda x: f'{x[0]}_{x[1]}') result.index.name='folder' result.reset_index(inplace=True) #result = result.sort_values(by='folder') #result = result.sort_index() result = result[['folder', 'volume_mean', 'volume_std', 'convex_volume_mean', 'convex_volume_std', 'surface_area_mean', 'surface_area_std', 'length_mean', 'length_std', 'max_width_mean', 'max_width_std', 'max_depth_mean', 'max_depth_std']] result_path='H:/analysis_results/mean_std_HN.csv' result.to_csv(result_path,index=False) print('结果已保存到{}',format(result_path))如何根据folder的名称字母后的数字进行排序生成文件夹

folder_name = os.path.join(folder_path, folder) if not os.path.exists(folder_name): os.makedirs(folder_name) 在这个示例中，我们使用os模块获取文件夹列表，并使用Python的sorted函数对文件夹名称...

import pandas as pd# 读取 CSV 文件并手动指定列名df = pd.read_csv('example.csv', header=None, names=['Column1', 'Column2', 'Column3_new'])# 按第2列的时间先后顺序排序df = df.sort_values(by=[1], ascending=True)# 将排序后的结果写入原来的 CSV 文件中df.to_csv('example.csv', index=False, header=None)如果要将这段代码运用于处理整个文件夹的csv文件，怎么修改

import pandas as pd # 要处理的文件夹路径 folder_path = 'example_folder' # 遍历文件夹中的所有csv文件 for file_name in os.listdir(folder_path): if file_name.endswith('.csv'): # 构造csv文件的完整路径...

E:\anaconda\python.exe F:\pythonproject\江苏数据处理1\企业类型到各公司.py Traceback (most recent call last): File "F:\pythonproject\江苏数据处理1\企业类型到各公司.py", line 13, in <module> excel_to_csv('C:\\Users\\ASUS\\Desktop\\全部企业\\dl', '时间', '报警数/百公里') File "F:\pythonproject\江苏数据处理1\企业类型到各公司.py", line 9, in excel_to_csv selected_columns = excel_file.iloc[:, [col_1, col_2]] # 选出每个Excel中的指定列 File "E:\anaconda\lib\site-packages\pandas\core\indexing.py", line 961, in getitem return self._getitem_tuple(key) File "E:\anaconda\lib\site-packages\pandas\core\indexing.py", line 1458, in _getitem_tuple tup = self._validate_tuple_indexer(tup) File "E:\anaconda\lib\site-packages\pandas\core\indexing.py", line 769, in _validate_tuple_indexer self._validate_key(k, i) File "E:\anaconda\lib\site-packages\pandas\core\indexing.py", line 1372, in _validate_key raise IndexError(f".iloc requires numeric indexers, got {arr}") IndexError: .iloc requires numeric indexers, got ['时间' '报警数/百公里']

import pandas as pd import os def excel_to_csv(folder_path, col_1, col_2): for file_name in os.listdir(folder_path): if file_name.endswith('.xlsx'): excel_file = pd.read_excel(os.path.join(folder_...

import pandas as pd# 读取数据文件df = pd.read_csv('data.csv')# 按组织字段分组groups = df.groupby('组织字段')# 遍历每个组并将数据保存到工作簿中for name, group in groups: filename = f'{name}.xlsx' group.to_excel(filename, index=False),这个拆分后的数据存在那里了

这个代码会将按照'组织字段'分组后的数据保存为名为name.xlsx的Excel文件，其中name是组的名称。这些文件将保存在当前工作目录中，也就是你运行这段代码时所在的文件夹中。例如，如果你的代码文件和数据文件都...

for i in name_list: data=pd.read_csv(r"D:/批量处理文件/" + i,engine="python")批量处理xlsx文件这个代码要怎么改

csv_path = os.path.join(folder_path, name) xlsx_path = os.path.join(folder_path, xlsx_name) # 使用 pandas 库中的 read_csv() 函数读取 csv 文件 data = pd.read_csv(csv_path, engine="python") # ...

import pandas as pd import os folder_path = r'D:\pythonProject\csv' file_list = os.listdir(folder_path) for file_name in file_list: subfolder_path = os.path.join(folder_path, file_name) if os.path.isdir(subfolder_path): # 进入子文件夹 os.chdir(subfolder_path) # 获取子文件夹中的.csv文件列表 csv_list = [f for f in os.listdir(subfolder_path) if f.endswith('.csv')] # 读取.csv文件 dfs = [] for csv_file in csv_list: df = pd.read_csv(csv_file, header=None) dfs.append(df) csv_folder_name = os.path.basename(os.path.normpath(csv_list)) last_char = csv_folder_name[-1] wave = [] form = [] records = dfs for record in records: wave = record form = last_char print(wave) print(form) # print(records)麻烦改一下

folder_path = r'D:\pythonProject\csv' file_list = os.listdir(folder_path) for file_name in file_list: subfolder_path = os.path.join(folder_path, file_name) if os.path.isdir(subfolder_path): # 进入...

import pandas as pd import os # 读取.csv文件 folder_path = r'D:\pythonProject\csv' file_list = os.listdir(folder_path) for file_name in file_list: subfolder_path = os.path.join(folder_path, file_name) if os.path.isdir(subfolder_path): # 进入子文件夹 os.chdir(subfolder_path) # 获取子文件夹中的.csv文件列表 csv_list = [f for f in os.listdir(subfolder_path) if f.endswith('.csv')] # 读取.csv文件 dfs = [] for csv_file in csv_list: df = pd.read_csv(csv_file, header=None) dfs.append(df) csv_folder_name = os.path.basename(subfolder_path) last_char = csv_folder_name[-1] wave = [0]256 # form = [] records = dfs beat = [0]len(records) i = 0 for wave in records: form = last_char # print(wave) # print(form) beat[i] = [wave, form] # print('beat[{}] ='.format(i), beat[i]) # print('len(beat[{}]) ='.format(i), len(beat[i])) i = i + 1 # 划分特征与标签 X = beat[:, 0] y = beat[:, 1] print(X, y)怎么改

在你的代码中，beat是一个列表，其中每个元素都是一个列表，其中第一个元素是wave，第二个元素是form。在最后一行代码中，你尝试使用[:, 0]和[:, 1]对beat进行切片来获取X和y，但这样做是不正确的，...

import pandas as pd import wfdb from sklearn.model_selection import train_test_split import os import csv import numpy as np folder_path = r'C:\Users\bubble\PycharmProjects\pythonProject\csv' file_list = os.listdir(folder_path) for file_name in file_list: subfolder_path = os.path.join(folder_path, file_name) if os.path.isdir(subfolder_path): # 进入子文件夹 os.chdir(subfolder_path) # 获取子文件夹中的.csv文件列表 csv_list = [f for f in os.listdir(subfolder_path) if f.endswith('.csv')] # 读取.csv文件 dfs = [] for csv_file in csv_list: df = pd.read_csv(csv_file, header=None) dfs.append(df) csv_folder_name = os.path.basename(subfolder_path) last_char = csv_folder_name[-1] wave = [] form = [] records = dfs for record in records: wave = record form = last_char #print(wave) #print(form) W = [wave, form] T = [W] T = np.array(T) #划分特征与标签 X =T[:, :-1] y =T[:, -1] print(X) print(y)这段代码有错误吗？该怎么改

folder_path = r'C:\Users\bubble\PycharmProjects\pythonProject\csv' file_list = os.listdir(folder_path) for file_name in file_list: subfolder_path = os.path.join(folder_path, file_name) if os.path....

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