不使用pandas进行python字符串操作

text = "Hello, World!"
words = text.split()  # 默认按空格分割
print(words)  # 输出：['Hello,', 'World!']

words = ['Hello,', 'World!']
text = ' '.join(words)
print(text)  # 输出："Hello, World!"

text = "Hello, World!"
new_text = text.replace("World", "Python")
print(new|text)  # 输出："Hello, Python!"

text = "Hello, World!"
index = text.find("World")
print(index)  # 输出：7

text = "  Hello, World!  "
stripped_text = text.strip()
print(stripped_text)  # 输出："Hello, World!"

text = "Hello, World!"
upper_text = text.upper()
lower_text = text.lower()
print(upper_text)  # 输出："HELLO, WORLD!"
print(lower_text)  # 输出："hello, world!"

text = "Hello, World!"
starts_with_hello = text.startswith("Hello")
ends_with_world = text.endswith("World!")
print(starts_with_hello)  # 输出：True
print(ends_with吉world)  # 输出：True