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This article mainly introduces "what are the tips for more concise for loops in python". In daily operation, I believe many people have doubts about the tips for for loops in python. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the questions of "which tips for for loops in python are more concise". Next, please follow the editor to study!

Zip: cycle through both lists at the same time

In practice, the author finds that the code can loop in two arrays at the same time. It is relatively difficult to do this in other programming languages, which reflects the simplicity of Python. To achieve the goal of looping in both arrays at the same time, simply use the zip () function.

For first,second in zip (array1,array2): print (first) print (second)

The effect of this function can be demonstrated by using this method in a sequence of even integers and a sequence of odd integers.

Odds = [1 odds,evens 3 5 7] evens = [2 odds 4 6 8 10] for oddnum, evennum in zip (odds,evens): print (oddnum) print (evennum)

The output of the above function is as follows:

1 2 3 4 5 6 7 8 9 10

In Range function: writing C-Style loops

C-Style may seem a little mundane, but it can shine in a loop.

For i in range (10): print (I) if I = 3: i.update (7)

C language enthusiasts may think that the above code is not a C-Style loop, but if you do not want to write your own iterative functions, the above is the perfect form.

However, the author is keen on "wasting time", so I decided to write a new iterative program to write the best possible C-Style loop.

Class forrange: def _ init__ (self, startOrStop,stop=None, step=1): if step= = 0: raise ValueError ('forrangestep argument must not be zero') if notisinstance (startOrStop,int): raise TypeError (' forrangestartOrStop argument must be an int') if stop is not None and notisinstance (stop) Int): raise TypeError ('forrangestop argument must be an int') if stop is None: self.start = 0 self.stop = startOrStop self.step = step else: self.start = startOrStop self.stop = stop self.step = step def _ iter__ (self): returnself.foriterator (self.start, self.stop) Self.step) class foriterator: def _ _ init__ (self, start, stop) Step): self.currentValue = None self.nextValue = start self.stop = stop self.step = step def _ _ iter__ (self): return self def next (self): if self.step > 0 andself.nextValue > = self.stop: raise StopIteration if self.step

> data {0: 5, 1: 10, 2: 15}

Sorted () function: sort using data instead of before use

The Sort function is critical for people who often need to deal with large amounts of data, arranging strings according to the initials A to B, and arranging integers and multiples from infinity to infinity. It is important to note that this function cannot be used for lists with strings and integers or floating point numbers.

L = [1513-6-1-8] for i in sorted (l): print (I) 1 6 8 15

You can also set the opposite parameter to False to perform the inverse operation.

For i in sorted (lcentury reverse = True): print (I) 15 8 6 1

For the last parameter available, you can use the key function. Key is a function that applies to every dimension in a known loop. The author prefers to use lambda,Lambda to create an anonymous but callable function.

L.sort (key=lambda s: s [::-1]) at this point, the study of "what are the tips for more concise for loops in python" is over, hoping to solve everyone's doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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