tests, pyb: Add 'import pyb' when needed.

tests/pyb/accel.py

@@ -1,3 +1,5 @@
+import pyb
+
 accel = pyb.Accel()
 print(accel)
 accel.x()

tests/pyb/dac.py

@@ -1,3 +1,5 @@
+import pyb
+
 dac = pyb.DAC(1)
 print(dac)
 dac.noise(100)

tests/pyb/extint.py

@@ -1,3 +1,5 @@
+import pyb
+
 ext = pyb.ExtInt('X1', pyb.ExtInt.IRQ_RISING, pyb.Pin.PULL_DOWN, lambda l:print('line:', l))
 ext.disable()
 ext.enable()

tests/pyb/i2c.py

@@ -1,3 +1,4 @@
+import pyb
 from pyb import I2C
 
 i2c = I2C(1)

tests/pyb/led.py

@@ -1,3 +1,4 @@
+import pyb
 from pyb import LED
 
 for i in range(4):

tests/pyb/rtc.py

@@ -1,4 +1,6 @@
+import pyb
 from pyb import RTC
+
 rtc = RTC()
 print(rtc)
 rtc.datetime((2014, 1, 1, 1, 0, 0, 0, 0))

tests/pyb/switch.py

@@ -1,6 +1,6 @@
 from pyb import Switch
 
-sw = pyb.Switch()
+sw = Switch()
 print(sw())
 sw.callback(print)
 sw.callback(None)

tests/pyb/timer.py

@@ -1,3 +1,4 @@
+import pyb
 from pyb import Timer
 
 tim = Timer(4)