print('Retrieved', len(data), 'characters') tree = ET.fromstring(data) lst = tree.findall(...
1.1 数值型(number) 例子: a, b, c, d = 20, 5.5, True, 4+3j print(a, b, c, d) # 20 5.5 True (4+3j) print(type(a), type(b), type(c), type(d)) # <class 'int'> <class 'float'> <class 'bool'> <class 'complex'> Python也可以这样赋值: ...
'age':30,'city':'New York'}# 打印字典中的每项信息print("First name:",person_info['first_name'])print("Last name:",person_info['last_name'])print("Age:",person_info['age'])print("City:",person_info['city'])
1. Allowed Characters Check Write a Python program to check that a string contains only a certain set of characters (in this case a-z, A-Z and 0-9). Click me to see the solution 2. a Followed by 0+ b's Write a Python program that matches a string that has anafollowed by zero ...
1. 编写一个Python程序，实现以下功能：输入一个整数，判断它是奇数还是偶数，并打印相应的结果。例如，输入10，输出“10是偶数”；输入7，输出“7是奇数”。2. 编写一个Python函数，该函数接收一个列表作为参数，并返回列表中所有偶数的和。例如，输入[1, 2, 3, 4, 5, 6]，输出12。3. 编写一个Python函数...
print("Inside function:", num) # Create an integer (immutable object) original_number = 5 # Pass the integer to the function modify_integer(original_number) # Check the integer outside the function print("Outside function:", original_number) As you can see, the value of the object insid...
When it comes to the repetition operator, the idea is to repeat the content of a given sequence a certain number of times. Here are a few examples: Python >>> "Hello" * 3 'HelloHelloHello' >>> 3 * "World!" 'World!World!World!' >>> ("A", "B", "C") * 3 ('A', 'B...
# access characters in string # declare, assign string str = "Hello world" # print complete string print "str:", str # print first character print "str[0]:", str[0] # print second character print "str[1]:", str[1] # print last character print "str[-1]:", str[-1] # print...
b mul＝a b div＝a／b print(sub, mul, div)｀｀｀通过这些简单的运算，你就能开始用Python解决一些基本的数学问题啦。二、条件判断 21判断奇偶数 要判断一个数是奇数还是偶数，可以用下面的代码：｀｀｀python number＝7 if number％2＝＝0:print(number,＂是偶数"）else:print(number,＂是奇数"）
This way, you can let your chosen shell take care of piping one process into another, instead of trying to reimplement things in Python. This is a perfectly valid choice in certain situations.Later in the tutorial, you’ll also come to see that you can’t pipe processes directly with run...