Time to proofread

quinn-dougherty · quinn-dougherty · commit da2eea2e2d21 · 2019-05-13T01:48:51.000-04:00
diff --git a/PYTHON-README.md b/PYTHON-README.md
@@ -1178,28 +1178,45 @@ Intervals are used in conjunction with set operations:
 <!-- [3, 5) - [4, 6] = [3, 4) -->
 <!-- [4, 6] - [3, 5)  = [5, 6] -->
 
-In code:
+Integer versions in basic python look like this
+
+```python
+# intersection of two int intervals
+[x for x in range(3,5) if x in range(4, 6+1)]
+# Out: [4]
+
+# Union of two int intervals
+[x for x in range(20) if x in range(3, 5) or x in range(4, 6+1)]
+# Out: [3, 4, 5, 6]
+
+# Set difference
+[x for x in range(3, 5) if x not in range(4, 6+1)]
+# Out: [3]
 
-```js
-var Interval = require('interval-arithmetic')
-var nextafter = require('nextafter')
+[x for x in range(4, 6+1) if x not in range(3, 5)]
+# Out: [5, 6]
+```
+
+Using `np.linspace`, we can approximate what the real versions would look like. 
 
-var a = Interval(3, nextafter(5, -Infinity))
-var b = Interval(4, 6)
+```python
+R = np.linspace(-1, 9, 100)
 
-Interval.intersection(a, b)
-// {lo: 4, hi: 4.999999999999999}
+# intersection of two float intervals
+[x for x in R if 3 <= x < 5 and 4 <= x <= 6]
 
-Interval.union(a, b)
-// {lo: 3, hi: 6}
+# Union of two float intervals
+[x for x in R if 3 <= x < 5 or 4 <= x <= 6]
 
-Interval.difference(a, b)
-// {lo: 3, hi: 3.9999999999999996}
+# set differences of two float intervals. 
+[x for x in R if 3 <= x < 5 and not (4 <= x <= 6)]
 
-Interval.difference(b, a)
-// {lo: 5, hi: 6}
+[x for x in R if 4 <= x <= 6 and not (3 <= x < 5)]
 ```
 
+You should definitely run these in repl and try to wrap your head around them. 
+
+
 
 ## more...
 
