Separate tensorflow version requirement setup.

PiperOrigin-RevId: 416917874

official/pip_package/setup.py

@@ -21,6 +21,7 @@ from setuptools import find_packages
 from setuptools import setup
 
 version = '2.7.0'
+tf_version = '2.7.0'  # Major version.
 
 project_name = 'tf-models-official'
 
@@ -61,8 +62,8 @@ if project_name == 'tf-models-nightly':
   install_requires.append('tf-nightly')
   install_requires.append('tensorflow-text-nightly')
 else:
-  install_requires.append(f'tensorflow~={version}')
-  install_requires.append(f'tensorflow-text~={version}')
+  install_requires.append(f'tensorflow~={tf_version}')
+  install_requires.append(f'tensorflow-text~={tf_version}')
 
 print('install_requires: ', install_requires)
 print('dependency_links: ', dependency_links)