Rich log (#3046)

* log

* tests

* snapshot tests

* change to richlog

* keep raw lines

* disable highlighting by default

* simplify

* superfluous test

* optimization

* update cell length

* add refresh

* write method

* version bump

* doc fix link

* makes lines private

* docstring

* relax dev dependancy

* remove superfluous code [skip ci]

* added FAQ [skipci]

* fix code in faq [skipci]

* fix typo

* max lines fix

tests/test_cache.py

@@ -240,3 +240,22 @@ def test_fifo_cache_hits():
     assert cache.misses == 2
 
     assert str(cache) == "<FIFOCache maxsize=4 hits=3 misses=2>"
+
+
+def test_discard():
+    cache = LRUCache(maxsize=3)
+    cache.set("key1", "value1")
+    cache.set("key2", "value2")
+    cache.set("key3", "value3")
+
+    assert len(cache) == 3
+    assert cache.get("key1") == "value1"
+
+    cache.discard("key1")
+
+    assert len(cache) == 2
+    assert cache.get("key1") is None
+
+    cache.discard("key4")  # key that does not exist
+
+    assert len(cache) == 2  # size should not change