很不幸，您无法原地修改字符串，因为字符串是不可变的。只需从您想要收集的几个部分创建一个新的字符串。但是，如果您仍然需要一个能够原地修改Unicode数据的对象，您应该使用
Let’s see what we discussed above −
In this example, we will return a string with the entire contents of the buffer. We have a text stream StringIO −
import io
myStr = "Hello, How are you?"
print("String = ",myStr)
# StringIO is a text stream using an in-memory text buffer
strIO = io.StringIO(myStr)
# The getvalue() returns a string containing the entire contents of the buffer
print(strIO.getvalue())
String = Hello, How are you? Hello, How are you?
现在，让我们改变流的位置，写入新内容并显示
We will see another example and change the stream position using the seek() method. A new string will be written at the same position using the write() method −
import io
myStr = "Hello, How are you?"
# StringIO is a text stream using an in-memory text buffer
strIO = io.StringIO(myStr)
# The getvalue() returns a string containing the entire contents of the buffer
print("String = ",strIO.getvalue())
# Change the stream position using seek()
strIO.seek(7)
# Write at the same position
strIO.write("How's life?")
# Returning the final string
print("Final String = ",strIO.getvalue())
String = Hello, How are you? Final String = Hello, How's life??
在这个例子中，使用array()创建一个数组，然后使用tounicode()方法将其转换为Unicode字符串 -
import array
# Create a String
myStr = "Hello, How are you?"
# Array
arr = array.array('u',myStr)
print(arr)
# Modifying the array
arr[0] = 'm'
# Displaying the array
print(arr)
# convert an array to a unicode string using tounicode
print(arr.tounicode())
array('u', 'Hello, How are you?')
array('u', 'mello, How are you?')
mello, How are you?
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