<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def InstallGRR(self, path):
 """Installs GRR."""


    cmd64 = [self.pip64, "install"]
    cmd32 = [self.pip32, "install"]

    if args.wheel_dir:
      cmd64 += ["--no-index", r"--find-links=file:///%s" % args.wheel_dir]
      cmd32 += ["--no-index", r"--find-links=file:///%s" % args.wheel_dir]

    cmd64.append(path)
    cmd32.append(path)

    subprocess.check_call(cmd64)
    if args.build_32:
      subprocess.check_call(cmd32)