流程控制,If 语句循环,else 语句不执行
Flow Control, If statement looping, else statement not executing
在以下代码中,我无法通过第一个 if
语句并继续执行其他 statement
,即使我故意将其设置为 false:
while not scraped:
print("sleep....")
time.sleep(1)
try:
res = requests.get(url).content
soup = BeautifulSoup(res, 'lxml')
links = soup.find_all("span", {"id":"reasonabledoubt"})
dip = soup.find_all("div")
print("searching divs")
if 'keyword' in str(dip) == True:
print(url)
print("LINK SCRAPED")
print(url + " link scraped")
scraped = True
else:
for word in links:
print("testing for loop")
#rest of code
所以基本上如果在 str(dip) 中找不到关键字,我需要执行 else 子句。
你需要:
if 'keyword' in str(dip):
您的旧语法:
if 'keyword' in str(dip) == True:
相当于:
if 'keyword' in str(dip) and str(dip) == True
在以下代码中,我无法通过第一个 if
语句并继续执行其他 statement
,即使我故意将其设置为 false:
while not scraped:
print("sleep....")
time.sleep(1)
try:
res = requests.get(url).content
soup = BeautifulSoup(res, 'lxml')
links = soup.find_all("span", {"id":"reasonabledoubt"})
dip = soup.find_all("div")
print("searching divs")
if 'keyword' in str(dip) == True:
print(url)
print("LINK SCRAPED")
print(url + " link scraped")
scraped = True
else:
for word in links:
print("testing for loop")
#rest of code
所以基本上如果在 str(dip) 中找不到关键字,我需要执行 else 子句。
你需要:
if 'keyword' in str(dip):
您的旧语法:
if 'keyword' in str(dip) == True:
相当于:
if 'keyword' in str(dip) and str(dip) == True