QChar is a data type used in the Qt framework, on which PyQt4 is built. QChar represents a single character in the Unicode standard, and it is used to manipulate individual characters in strings.

In PyQt4, QChar can be useful in situations where you need to access or modify individual characters in a string. For example, if you have a QLineEdit widget that contains a user's name, you can use QChar to iterate over the characters in the string and perform some operation on them.

Here's an example of how you could use QChar in PyQt4:

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from PyQt4.QtGui import QLineEdit

name_input = QLineEdit("John Doe")
for i in range(name_input.text().length()):
    c = name_input.text()[i]
    if c.isUpper():
        name_input.setText(name_input.text().replace(QChar(c), QChar(c.toLower())))

In this example, we're iterating over the characters in the user's name and checking if each character is uppercase. If it is, we use QChar to replace the uppercase character with its lowercase equivalent.

So the point of using QChar in PyQt4 is to manipulate individual characters in strings, which can be useful in a variety of situations where you need to work with text.