I have added another example in micropython for controlling the Servo with Potentiometer

controlwithpot.py

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+#This is a micropython example for controlling the servo with a potentiometer.
+#Potentiometer is referred as pot here.
+#Please connect the pot with pin 0
+#Please connect the pot with pin 1
+
+import machine
+import pyb
+import time
+
+pot = machine.ADC(0)
+servo = pyb.Servo(1)
+
+
+#Map function similar to the one in arduino
+def map(value, range1_lb, range1_ub, range2_lb, range2_ub):
+  return ((value - range1_lb) * (range2_ub - range2_lb) / (range1_ub - range1_lb) + range2_lb )
+
+while(True):
+  value = pot.read()
+  value = int(map(value, 0, 1024, -90, 90))
+  servo.angle(value, 1000)
+  time.sleep(1)

examples/Sweep/Sweep.py

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+#Sweep of Servo
+# Using the Servo
+# Make sure you have the Servo checkbox marked!
+
+import machine
+import pyb
+import time
+
+# The pyboard has four simple servo connections
+servo = pyb.Servo(1)
+while(1):
+    for x in range(-90,91):
+        servo.angle(x, 5000)
+        time.sleep_ms(15)
+    for x in range(90,-91, -1):
+        servo.angle(x, 5000)
+        time.sleep_ms(15)