Python中的字符串操作

str1 = "Hello"
str2 = "World"
str3 = str1 + " " + str2
print(str3)

Hello World

str4 = "deepinout.com"
str5 = str4 * 3
print(str5)

deepinout.comdeepinout.comdeepinout.com

str6 = "deepinout.com"
print(str6.find("in"))
print(str6.find("abc"))

1
-1

try:
    print(str6.index("out"))
    print(str6.index("abc"))
except ValueError as e:
    print("Error:", e)

6
Error: substring not found

## 字符串的替换

在Python中，可以使用`replace()`方法来替换字符串中的子串。

```python
str7 = "deepinout.com is a great website"
str8 = str7.replace("great", "wonderful")
print(str8)

deepinout.com is a wonderful website

str9 = "deepinout.com"
print(str9[2:7])

epino

str10 = "deepinout.com is a great website"
words = str10.split(" ")
print(words)

['deepinout.com', 'is', 'a', 'great', 'website']

str11 = "-".join(words)
print(str11)

deepinout.com-is-a-great-website