Create dt_string.py (#2846)

creating dt_string for tabbed examples

doctests/dt_string.py

@@ -0,0 +1,56 @@
+# EXAMPLE: set_tutorial
+# HIDE_START
+import redis
+
+r = redis.Redis(decode_responses=True)
+# HIDE_END
+
+# STEP_START set_get
+res1 = r.set("bike:1", "Deimos")
+print(res1)  # True
+res2 = r.get("bike:1")
+print(res2)  # Deimos
+# STEP_END
+
+# REMOVE_START
+assert res1 == True
+assert res2 == "Deimos"
+# REMOVE_END
+
+# STEP_START setnx_xx
+res3 = r.set("bike:1", "bike", nx=True)
+print(res3)  # None
+print(r.get("bike:1"))  # Deimos
+res4 = r.set("bike:1", "bike", xx=True)
+print(res4)  # True
+# STEP_END
+
+# REMOVE_START
+assert res3 == None
+assert res4 == True
+# REMOVE_END
+
+# STEP_START mset
+res5 = r.mset({"bike:1": "Deimos", "bike:2": "Ares", "bike:3": "Vanth"})
+print(res5)  # True
+res6 = r.mget(["bike:1", "bike:2", "bike:3"])
+print(res6)  # ['Deimos', 'Ares', 'Vanth']
+# STEP_END
+
+# REMOVE_START
+assert res5 == True
+assert res6 == ["Deimos", "Ares", "Vanth"]
+# REMOVE_END
+
+# STEP_START incr
+r.set("total_crashes", 0)
+res7 = r.incr("total_crashes")
+print(res7)  # 1
+res8 = r.incrby("total_crashes", 10)
+print(res8)  # 11
+# STEP_END
+
+# REMOVE_START
+assert res7 == 1
+assert res8 == 11
+# REMOVE_END