我有一個主要功能，它從用戶輸入中搜索帶有 2 個關鍵字的 txt 文件，如果找到它，它將打印 txt 文件中的行。我想編寫另一個函數（send_email），如果主函數在文件中找不到匹配的任何內容，它就會執行，我們將不勝感激。def main_function(): with open("file.txt", "r") as f: for line in f.readlines(): if line.startswith(area) and name in line: print("\n" + "\n" + "SPP Location:" + "\n" + line + "\n")main_function()def send_email(): blah blah blahif main_function is False: send_email
4 回答
一只萌萌小番薯
TA貢獻1795條經驗 獲得超7個贊
你可以通過設置一個標志來做到這一點。如果您遍歷文件但沒有找到匹配項，則標志保持為假。
def main_function():
with open("file.txt", "r") as f:
find_flag = False
for line in f.readlines():
if line.startswith(area) and name in line:
print("\n" + "\n" + "SPP Location:" + "\n" + line + "\n")
find_flag = True
if not find_flag:
send_email()
寶慕林4294392
TA貢獻2021條經驗 獲得超8個贊
干得好。無需單獨調用 main_function。當您評估條件“not main_function()”時，它將被調用。
def main_function():
with open("file.txt", "r") as f:
for line in f.readlines():
if line.startswith(area) and name in line:
print("\n" + "\n" + "SPP Location:" + "\n" + line + "\n")
return True
return False
def send_email():
blah blah blah
if not main_function():
send_email()
莫回無
TA貢獻1865條經驗 獲得超7個贊
您可以將匹配成功保存在一個變量中，如果變量沒有因匹配而改變，則調用該函數：
def main_function():
with open("file.txt", "r") as f:
results = 0
for line in f.readlines():
if line.startswith(area) and name in line:
print("\n" + "\n" + "SPP Location:" + "\n" + line + "\n")
results = 1
if results == 0:
send_email()
www說
TA貢獻1775條經驗 獲得超8個贊
下面的腳本怎么樣：
try:
main_function
except:
send_email
這樣，如果 main_function 函數拋出錯誤，python 將捕獲它，并調用 send_email 函數。
或者，如果您不希望 main_function 因拋出錯誤而失敗，您可以執行以下操作：
def main_function():
success = False
with open("file.txt", "r") as f:
for line in f.readlines():
if line.startswith(area) and name in line:
print("\n" + "\n" + "SPP Location:" + "\n" + line + "\n")
success = True
return success
def send_email():
blah blah blah
main_function_success = main_function()
if not main_function_success:
send_email
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