CSV模块中的Python writerow方法跳过一行

l7wslrjt  于 2023-01-10  发布在  Python
关注(0)|答案(1)|浏览(110)

我正在开发一个软件来处理一家公司的截止日期。我想导出SQL表到Excel文件的CSV。我已经阅读了这个问题How to export Mysql Table data to excel file using python script?,并尝试提供的解决方案,但我遇到了一个问题。CSV文件跳过一行(有一个空行之间的每一个书面行,见示例)。

rg,parti,oggetto,incombente,autorita,giudice,deadline_id,member_id,data,ora,minuti,notes,terminata

123,io,bo,a,ibi,prof,2,1,2022-11-13,10,0,adfggnadfnadf,0

123,io,bo,ia,ib,prof,3,1,2023-01-14,1,24,adfggnadfnadfadfggnadfnadf,0

1241426,sdfgn,ASDG,srtgnawetjn,hgdm,sry,4,1,2023-01-07,10,24,WQEGOUIB<IUSDBV,0

124512,wrtj,SADG,tgjw,rtyj,sfgjh,5,1,2023-01-07,10,31,srgoibn,0

代码如下所示:

cursor.execute("SELECT * FROM `lawsuit` INNER JOIN `calendar` WHERE lawsuit.rg = calendar.rg;")
result = cursor.fetchall()
print(result)

        def save_file():
            file_path = asksaveasfile(initialfile='Untitled.csv',
                                      defaultextension=".csv",
                                      filetypes=[("CSV file", "*.csv")])
            if file_path:
                writer = csv.writer(file_path)
                writer.writerow(result[0].keys())
                for row in result:
                    print(row)
                    writer.writerow(row.values())
            else:
                messagebox.showerror("NO FILE SELECTED", "You have cancelled the action, the file has not been created")

btn = tk.Button(self.root, text="Export to CSV", command=lambda: save_file())
btn.place(x=10, y=10)

为了简化每个人的工作,我将在这里简单地附上打印result变量的结果(这样我们就不需要处理SQL表了)。

[{'rg': 123, 'parti': 'io', 'oggetto': 'bo', 'incombente': 'a', 'autorita': 'ibi', 'giudice': 'prof', 'deadline_id': 2, 'member_id': 1, 'data': datetime.date(2022, 11, 13), 'ora': 10, 'minuti': 0, 'notes': 'adfggnadfnadf', 'terminata': 0}, {'rg': 123, 'parti': 'io', 'oggetto': 'bo', 'incombente': 'ia', 'autorita': 'ib', 'giudice': 'prof', 'deadline_id': 3, 'member_id': 1, 'data': datetime.date(2023, 1, 14), 'ora': 1, 'minuti': 24, 'notes': 'adfggnadfnadfadfggnadfnadf', 'terminata': 0}, {'rg': 1241426, 'parti': 'sdfgn', 'oggetto': 'ASDG', 'incombente': 'srtgnawetjn', 'autorita': 'hgdm', 'giudice': 'sry', 'deadline_id': 4, 'member_id': 1, 'data': datetime.date(2023, 1, 7), 'ora': 10, 'minuti': 24, 'notes': 'WQEGOUIB<IUSDBV', 'terminata': 0}, {'rg': 124512, 'parti': 'wrtj', 'oggetto': 'SADG', 'incombente': 'tgjw', 'autorita': 'rtyj', 'giudice': 'sfgjh', 'deadline_id': 5, 'member_id': 1, 'data': datetime.date(2023, 1, 7), 'ora': 10, 'minuti': 31, 'notes': 'srgoibn', 'terminata': 0}, {'rg': 12453425, 'parti': 'arhnadfn', 'oggetto': 'sdfna', 'incombente': 'aedrh', 'autorita': 'sdfgn', 'giudice': 'aetn', 'deadline_id': 6, 'member_id': 1, 'data': datetime.date(2023, 1, 7), 'ora': 10, 'minuti': 30, 'notes': 'enqefnadfn\naethnadf', 'terminata': 0}]

根据@Adrian Klaver comment的观点,问题可能存在于asksaveasfile函数中。如果我打印file_path变量,我会得到:name='C:/Users/serax/OneDrive/Documenti/a.csv' mode='w' encoding='cp1252'>.
这是一个io.TextIoWrapper(https://docs.python.org/3/library/io.html#io.TextIOWrapper),在写模式下有一些奇怪的编码。如果我设法从这个io.TextIoWrapper对象中检索到文件的路径,我就可以用标准的open()函数打开它,希望它能工作。
任何帮助都是非常感谢的!!!)

20jt8wwn

20jt8wwn1#

解决了!:D

cursor.execute("SELECT * FROM `lawsuit` INNER JOIN `calendar` WHERE lawsuit.rg = calendar.rg;")
result = cursor.fetchall()
print(result)    
file_path = asksaveasfilename(initialfile='Untitled.csv',
                                          defaultextension=".csv",
                                          filetypes=[("CSV file", "*.csv")])
print(file_path)
if file_path:
      with open(file_path, "w", newline="") as file:
                    writer = csv.writer(file)
                    writer.writerow(result[0].keys())
                    for row in result:
                        print(row)
                        writer.writerow(row.values())
else:
     messagebox.showerror("NO FILE SELECTED", "You have cancelled the action, the file has not been created")

btn = tk.Button(self.root, text="Export to CSV", command=lambda: save_file())
btn.place(x=10, y=10)

我没有使用asksavefile返回Io对象,而是使用asksavefilename返回新建文件的路径,然后正常打开文件并将newline=""添加到open()中,文件现在不留下任何空行!

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