To iterate through a list without using indices, you can utilize the `next()` function along with an iterator created from your iterable. The iterable in this case is represented by a list named `categorylist`. To create an iterator from this list, simply use `iter(categorylist)`.
Once you have the iterator, you can use the `next()` function to retrieve items one by one from the list each time you call it.
For example:
my_list = ['a', 'b', 'c', 'd']
my_list_iterator = iter(my_list)
print(next(my_list_iterator)) #output: 'a'
print(next(my_list_iterator)) #output: 'b'
print(next(my_list_iterator)) #output: 'c'
print(next(my_list_iterator)) #output: 'd'
If you try to call `next()` once you've reached the end of the list, a `StopIteration` exception will be raised.
To handle this error, there are two approaches:
# Approach 1: Provide a default value as the second parameter to next() function
my_list = ['a', 'b', 'c', 'd']
my_list_iterator = iter(my_list)
MY_DEFAULT = 'my_default'
print(next(my_list_iterator, MY_DEFAULT)) #output: 'a'
print(next(my_list_iterator, MY_DEFAULT)) #output: 'b'
print(next(my_list_iterator, MY_DEFAULT)) #output: 'c'
print(next(my_list_iterator, MY_DEFAULT)) #output: 'd'
print(next(my_list_iterator, MY_DEFAULT)) #output: 'my_default'
...
print(next(my_list_iterator, MY_DEFAULT)) #output: 'my_default'
# Approach 2: Use next() a fixed number of times based on list size:
for i in range(len(my_list)):
print(next(my_list_iterator))
# outputs: prints 'a', 'b', 'c', 'd' each on a new line
How can you implement this in your code?
categorylist_iterator = iter(categorylist)
next(categorylist_iterator) # skip the 0th index to start iteration from index 1
while True:
categoryindex = next(categorylist_iterator)
try:
ignored_exceptions = (NoSuchElementException, StaleElementReferenceException)
WebDriverWait(driver, 20, ignored_exceptions=NoSuchElementException).until(EC.element_to_be_clickable((By.XPATH, f"//div[child::span[text()='{oddsnumber}'] and span[text()='{oddstype}']]"))).click()
except:
ignored_exceptions = (NoSuchElementException, StaleElementReferenceException,)
WebDriverWait(driver, 20, ignored_exceptions=NoSuchElementException).until(EC.element_to_be_clickable((By.XPATH, f"//div[text() ='{categoryindex}']"))).click()
However, you need to prevent the `StopIteration` error in your code. If the iteration on `categorylist` reaches its end, the error will occur!
DEFAULT_INDEX = 'A value which not exists in the list categorylist. for example it can be a random token'
categorylist_iterator = iter(categorylist)
next(categorylist_iterator) # skip the 0th index to start iteration from index 1
while True:
categoryindex = next(categorylist_iterator, DEFAULT_INDEX)
if categoryindex == DEFAULT_INDEX:
break
try:
ignored_exceptions = (NoSuchElementException, StaleElementReferenceException)
WebDriverWait(driver, 20, ignored_exceptions=NoSuchElementException).until(EC.element_to_be_clickable((By.XPATH, f"//div[child::span[text()='{oddsnumber}'] and span[text()='{oddstype}']]"))).click()
except:
ignored_exceptions = (NoSuchElementException, StaleElementReferenceException,)
WebDriverWait(driver, 20, ignored_exceptions=NoSuchElementException).until(EC.element_to_be_clickable((By.XPATH, f"//div[text() ='{categoryindex}']"))).click()