Update README.md

CircuitSacul · Dec 2, 2022 · ba7ddfd · ba7ddfd
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 # mockeval
- Cursed lambdas because yes
+Cursed lambdas because yes.
+
+## Usage
+```py
+from mockeval import var, val
+
+times2 = var.x * 2
+print(times2.evl(x=2))  # 4
+
+list_with_unkowns = val([1, 2, var.third, var.fourth])
+print(list_with_unkowns.evl(third=3, fourth=4))  # [1, 2, 3, 4]
+
+print(list_with_unkowns.map(sum).evl(third=3, fourth=4))  # 10
+```
+
+## Why?
+yes.