Python 3 允许使用 Unicode 字符作为标识符,可以用中文作为变量名,非 ASCII 标识符也是允许的了。 姓名= "张三" # 合法π = 3.14159 # 合法测试标识符是否合法:实例 def is_valid_identifier(name): try: exec(f"{name} = None") return True except: return False print(is_valid_identifier("2var"))...
print(double(1) + 3) # 会输出 5 我在一个名叫 “double” 函数里! 5 函数可以有任意多个参数,也可以一个都没有 # 三个参数 def f(x, y, z): return x + y + z print(f(1, 3, 2)) # 返回 6 6 # 无参数 def g(): return 42 print(g()) # 返回 42 42 可是如果参数数目没有...
print(x) print(y) Try it Yourself » Variables do not need to be declared with any particulartype, and can even change type after they have been set. Example x =4# x is of type int x ="Sally"# x is now of type str print(x) ...
")3print(f"You have {boxes_of_crackers} boxes of crackers!")4print("Man that's enough for a party!")5print("Get a blanket.\n")678print("We can just give the function numbers directly:")9cheese_and_crackers(20,30)101112print("OR, we can use variables from our script...
#!/usr/bin/python3 counter = 100 # An integer assignment miles = 1000.0 # A floating point name = "John" # A string print (counter) print (miles) print (name) Here, 100, 1000.0 and "John" are the values assigned to counter, miles, and name variables, respectively. This produces th...
1We can just give the function numbers directly:2You have20cheeses!3You have30boxes of crackers!4Man that's enough for a party! 5 Get a blanket. 6 7 OR, we can use variables from our script: 8 You have 10 cheeses! 9 You have 50 boxes of crackers!
2400,3,369000 1416,2,232000 将数据逐行读取,用逗号切分,并放入np.array #加载数据 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #加载数据 defload_exdata(filename):data=[]withopen(filename,'r')asf:forlineinf.readlines():line=line.split(',')current=[int(item)foriteminline]#5.5277,9.13...
If we define a variable with names a = 100 and A =200 then, Python differentiates between a and A. These variables are treated as two different variables (or objects). Example a = 100 A = 200 # value of a print(a) # 100 # Value of A print(A) # 200 a = a + A print(a)...
print(my_int) Copy Output 103204934813 Using variables, we can quickly and easily domath. Withmy_int = 103204934813, let’s subtract the integer value 813: print(my_int-813) Copy Output 103204934000 In this example, Python does the math for us, subtracting 813 from the variablemy_intto re...
def outer_function(): scope = "local" def inner_function(): nonlocal scope scope = "nonlocal" print(scope) inner_function() print(scope) Summary Variables are used in every program. They are a type of identifier. We learned how to define a variable, rules associated with it, and how...