[x for x in os.listdir(path) if x.endswith(".xlsx")]

As an AI language model, I do not have access to the operating system, so I cannot execute this code directly. However, I can explain what this code does.

This is a list comprehension in Python that uses the os module to list all files in the specified path that end with ".xlsx". The expression inside the square brackets creates a list of filenames that satisfy the condition specified in the if statement.

The os.listdir(path) function returns a list of all files and directories in the specified path. The condition x.endswith(".xlsx") checks if the filename x ends with the string ".xlsx". If the condition is true, the filename is included in the resulting list.

For example, if the path is "/home/user/documents", this code will return a list of all Excel files in the "documents" directory.