Choose your preferred environment
Standard environment
The Python 3.7 runtime is capable of running any framework, library, or binary.
Optimized to scale nearly instantaneously to handle huge traffic spikes.
The Python 2.7 runtime is not recommended because Python 2 is no longer supported by the community.
Flexible environment
Open source runtimes capable of running any framework, library, or binary.
Greater CPU and memory instance types.
Can access resources in the same Compute Engine network.
Python 2.7 and 3.6
No free tier. Application always has a minimum number of running instances. Most cost-effective for applications that serve traffic continuously.