I am working on a software to handle a firm's deadlines. I want to export the SQL table to a CSV of excel file. I have read this question How to export Mysql Table data to excel file using python script? and tried the offered solution but I encountered an issue. The CSV file skips a row (there is a blank line between each written line, see example).
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
The code is the following:
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)
To simplify everyone's life I will simply attach the result of printing the result
variable here (So that we don't need to work with the SQL tables.)
[{'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}]
Following @Adrian Klaver comment's idea the issue may reside in the asksaveasfile
function. If I print the file_path variable I get:
name='C:/Users/serax/OneDrive/Documenti/a.csv' mode='w' encoding='cp1252'>
.
This is an io.TextIoWrapper
(https://docs.python.org/3/library/io.html#io.TextIOWrapper) with some weird encoding in write mode. If i manage to retrieve the path of the file from this io.TextIoWrapper
object I can then open it with the standard open()
function and hopefully it will work.
Any help is very much appreciated!!! ;)
CodePudding user response:
SOLVED IT! :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)
Instead of using asksavefile
which return an Io
object I use asksavefilename
which returns the path of the newly created file. Then I just open it normally and add the newline=""
to open()
. The file now does not leave any blank line!