if condition: value = true-expr else: value = false-expr 下面是一个更具体的例子: In [126]: x = 5 In [127]: 'Non-negative' if x >= 0 else 'Negative' Out[127]: 'Non-negative' 和if-else一样,只有一个表达式会被执行。因此,三元表达式中的if和else可以包含大量的计算,但只有True的...
在“第 3 章”和“创建第一个深度学习 Web 应用”中,我们看到了如何使用 Python 编写 Flask API,我们看到了如何在 Web 应用中使用该 API。 现在,我们知道 API 与语言库的区别以及使用 API的重要性。 我们熟悉一些顶尖组织提供的各种深度学习 API。 在接下来的章节中,我们将了解如何使用这些 API 来构建...
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if x < 0: print('It's negative') 1. 2. if后面可以跟一个或多个elif,所有条件都是False时,还可以添加一个else: if x < 0: print('It's negative') elif x == 0: print('Equal to zero') elif 0 < x < 5: print('Positive but smaller than 5') else: print('Positive and larger t...
else: return handle_value(value) 要优于 try: # Too broad! return handle_value(collection[key]) except KeyError: # Will also catch KeyError raised by handle_value() return key_not_found(key) 6 使用startswith() and endswith()代替切片进行序列前缀或后缀的检查。比如: ...
Use inline comments sparingly. An inline comment is a comment on the same line as a statement. Inline comments should be separated by at least two spaces from the statement. They should start with a # and a single space. Inline comments are unnecessary and in fact distracting if they state...
if initial is None: res = lseq.pop(0) #弹出第一个成员 else: res = initial for eachItem in lseq: res = bin_func(res,eachItem) return res 4、zip函数: 使用zip函数可以把两个列表合并起来,成为一个元组的列表。生成字典函数dict(): ...
If you don't see the inline debugging values, check that it's enabled in the debugger settings. Click on the debugger toolbar and select Debugger Settings. Make sure that Show Variable Values in Editor is enabled. Summary So, you've done it! Congrats! Let's repeat what you've done...
ContextAnalysis(JapaneseContextAnalysis): def get_order(self, aStr): if not aStr: return -1, 1 # find out current char's byte length if ((aStr[0] >= '\x81') and (aStr[0] <= '\x9F')) or \ ((aStr[0] >= '\xE0') and (aStr[0] <= '\xFC')): charLen = 2 else: ...
def memoize(f): memo = {} return def(x): if x not in memo: memo[x] = f(x) return memo[x] @memoize def fib(n): if n == 0: return 0 elif n == 1: return 1 else: return fib(n-1) + fib(n-2)JavaScript:function _$rapyd$_in(val, arr) { if (arr instanceof Array ...