仅需10道题轻松掌握Python字符串方法 | Python技能树征题

x33g5p2x  于10个月前 转载在 Python  
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0.前言

文本处理在几乎所有应用程序中都会有所涉及,例如文本的搜索、替换和删除等操作,为了方便的处理这些常见问题,Python 字符串内建了相关方法,我们就通过 10 道编程题来掌握这些常用的 Python 字符串方法吧!

1. 第 1 题:字符串检查

知识点描述:Python 字符串内建了多种方法用于检测字符类型是字母、数字或者其他类型。
问题描述:请从以下选项中选出输出为 True 的选项:
A.

string = '11.2'
result = string.isdigit()
print(result)

B.

string = '四十'
result = string.isnumeric()
print(result)

C.

string = '11.2'
result = string.isnumeric()
print(result)

D.

string = '四十'
result = string.isdigit()
print(result)

正确答案: B

2. 第 2 题:字符串大小写转换

知识点描述:将字符串中的字母进行大小写的转换是文本处理中常见的操作。
问题描述:将字符串中每个单词首字母转换为大写字母,请从以下选项中选出你认为正确的答案:
A.

string = 'Learn PYTHON from beginner to exPERT!'
result = string.upper()
print(result)

B.

string = 'Learn PYTHON from beginner to exPERT!'
result = string.capitalize()
print(result)

C.

string = 'Learn PYTHON from beginner to exPERT!'
result = string.lower().capitalize()
print(result)

D.

string = 'Learn PYTHON from beginner to exPERT!'
result = string.title()
print(result)

正确答案: D

3. 第 3 题:字符串开头或结尾匹配

知识点描述:通过指定的文本模式检查字符串的开头或者结尾。
问题描述:请从以下选项中选出输出为 True 的选项:
A.

choices = 'http:'
url = "https://blog.csdn.net/LOVEmy134611"
result = url.startswith(choices)
print(result)

B.

choices = ['http:', 'https:']
url = "https://blog.csdn.net/LOVEmy134611"
result = url.startswith(choices)
print(result)

C.

choices = ['http:', 'https:']
url = "https://blog.csdn.net/LOVEmy134611"
result = url.startswith(tuple(choices))
print(result)

D.

choices = 'https:'
url = "https://blog.csdn.net/LOVEmy134611"
result = url.endswith(choices)
print(result)

正确答案: C

4. 第 4 题:字符串匹配和搜索

知识点描述:匹配或者搜索特定模式的文本。
问题描述:请从以下选项中选出能够正确搜索 “Python” 第一次出现位置的答案:
A.

string = "Python is very simple, Let's learn Python together"
result = string.startswith('Python')
print(result)

B.

string = "Python is very simple, Let's learn Python together"
result = string.rfind('Python')
print(result)

C.

string = "Python is very simple, Let's learn Python together"
result = string.find('Python')
print(result)

D.

string = "Python is very simple, Let's learn Python together"
result = string.find('python')
print(result)

正确答案: C

5. 第 5 题:字符串替换

知识点描述:在字符串中搜索和匹配指定的文本,并进行使用其它字符进行替换。
问题描述:请从以下选项中选出能够正确将第一次出现的 “better” 替换为 “worse” 的答案:
A.

string = """Beautiful is better than ugly. Explicit is better than implicit. Simple is better than complex."""
index = string.find('better')
result = string.replace('better', 'worse', 1)
print(result)

B.

string = """Beautiful is better than ugly. Explicit is better than implicit. Simple is better than complex."""
index = string.find('better')
result = string.replace('better', 'worse', 0)
print(result)

C.

string = """Beautiful is better than ugly. Explicit is better than implicit. Simple is better than complex."""
index = string.find('better')
result = string.replace('better', 'worse', -1)
print(result)

D.

string = """Beautiful is better than ugly. Explicit is better than implicit. Simple is better than complex."""
result = string.replace('better', 'worse')
print(result)

正确答案:A

6. 第 6 题:删除字符串中不需要的字符

知识点描述:去掉文本字符串开头,结尾或者中间不需要的字符。
问题描述:请从以下选项中选出能够正确去除开头和结尾空白字符(空白字符包括空格、换行符和 tab 键)的选项:
A.

string = " \n Beautiful is better than ugly. \n "
result = string.replace('\n', '')
print(result)

B.

string = " \n Beautiful is better than ugly. \n "
result = string.rstrip()
print(result)

C.

string = " \n Beautiful is better than ugly. \n "
result = string.strip(' ')
print(result)

D.

string = " \n Beautiful is better than ugly. \n "
result = string.lstrip().rstrip()
print(result)

正确答案:D

7. 第 7 题:字符串对齐

知识点描述:通过指定的对齐方式来格式化字符串。
问题描述:将给定字符串居中,并指定返回字符串长度为40,使用等号("=")进行填充,请从以下选项中选出你认为正确的答案:
A.

string = "Beautiful is better than ugly."
result = string.center(len(string)+40, '=')
print(result)

B.

string = "Beautiful is better than ugly."
result = string.center(40, '=')
print(result)

C.

string = "Beautiful is better than ugly."
result = string.rjust(40,'=')
print(result)

D.

string = "Beautiful is better than ugly."
result = string.ljust(40,'=')
print(result)

正确答案:B

8. 第 8 题:字符串分割

知识点描述:将一个大的字符串分割为若干个小的字符串。
问题描述:将给定字符串划分为单词,并将单词首字母大写,请从以下选项中选出你认为正确的答案:
A.

string = 'Beautiful is better than ugly.'
result = string.split()
result = [i.strip('.') for i in result]
print(result)

B.

string = 'Beautiful is better than ugly.'
result = string.split()
result = [i.title() for i in result]
print(result)

C.

string = 'Beautiful is better than ugly.'
result = string.split()
result = [i.title().strip('.') for i in result]
print(result)

D.

string = 'Beautiful is better than ugly.'
result = string.split()
result = [i.strip('.').upper() for i in result]
print(result)

正确答案:C

9. 第 9 题:字符串的合并拼接

知识点描述:将几个小的字符串合并为一个大的字符串。
问题描述:将列表中元素合并为一个大的字符串,请从以下选项中选出你认为正确的答案:
A.

list_part = ['The', 'area', 'of', 'the', 'school', 'is', 1.7, 'million', 'square', 'meters.']
result = ' '.join(list_part)
print(result)

B.

list_part = ['The', 'area', 'of', 'the', 'school', 'is', 1.7, 'million', 'square', 'meters.']
result = ' '.join(str(i) for i in list_part)
print(result)

C.

list_part = ['The', 'area', 'of', 'the', 'school', 'is', 1.7, 'million', 'square', 'meters.']
result = ''.join(list_part)
print(result)

D.

list_part = ['The', 'area', 'of', 'the', 'school', 'is', 1.7, 'million', 'square', 'meters.']
result = ''.join(str(i) for i in list_part)
print(result)

正确答案:B

10. 第 10 题:在字符串中插入变量

知识点描述:创建含有变量的字符串,最终变量被值字符串替换掉。
问题描述:使用变量值替换字符串中的变量,请从以下选项中选出你认为正确的答案:
A.

string = 'The price of {fruit} is ${price}.'
result = string.format()
print(result)

B.

string = 'The price of {fruit} is ${price}.'
result = string.format(fruit = 'apple')
print(result)

C.

string = 'The price of {fruit} is ${price}.'
fruit = 'apple'
price = 2
result = string.format(vars())
print(result)

D.

string = 'The price of {fruit} is ${price}.'
fruit = 'apple'
price = 2
result = string.format_map(vars())
print(result)

正确答案:D

试题代码地址

https://codechina.csdn.net/LOVEmy134611/python_problem

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