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# User Guide
## Basic Exclusive Lock Usage
Exclusive Lock for independent processes has the same API as the
[threading.Lock](https://docs.python.org/3/library/threading.html#threading.Lock)
for threads:
```python
import fasteners
import threading
lock = threading.Lock() # for threads
lock = fasteners.InterProcessLock('path/to/lock.file') # for processes
with lock:
... # exclusive access
# or alternatively
lock.acquire()
... # exclusive access
lock.release()
```
## Basic Reader Writer lock usage
Reader Writer lock has a similar API, which is the same for threads or processes:
```python
import fasteners
# for threads
rw_lock = fasteners.ReaderWriterLock()
# for processes
rw_lock = fasteners.InterProcessReaderWriterLock('path/to/lock.file')
with rw_lock.write_lock():
... # write access
with rw_lock.read_lock():
... # read access
# or alternatively, for processes only:
rw_lock.acquire_read_lock()
... # read access
rw_lock.release_read_lock()
rw_lock.acquire_write_lock()
... # write access
rw_lock.release_write_lock()
```
## Advanced usage
For more details and options see [Process lock details](inter_process.md) and [Thread lock details](inter_thread.md).
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