all: Rename "sys" module to "usys".

This is consistent with the other 'micro' modules and allows implementing
additional features in Python via e.g. micropython-lib's sys.

Note this is a breaking change (not backwards compatible) for ports which
do not enable weak links, as "import sys" must now be replaced with
"import usys".

8 files changed, 21 insertions, 21 deletions

diff --git a/tests/extmod/uctypes_array_assign_native_le.py b/tests/extmod/uctypes_array_assign_native_le.py
index d4c27fc4b..5bddfcdf2 100644
--- a/tests/extmod/uctypes_array_assign_native_le.py
+++ b/tests/extmod/uctypes_array_assign_native_le.py
@@ -1,4 +1,4 @@
-import sys
+import usys
 
 try:
     import uctypes
@@ -6,7 +6,7 @@ except ImportError:
     print("SKIP")
     raise SystemExit
 
-if sys.byteorder != "little":
+if usys.byteorder != "little":
     print("SKIP")
     raise SystemExit
 
diff --git a/tests/extmod/uctypes_array_assign_native_le_intbig.py b/tests/extmod/uctypes_array_assign_native_le_intbig.py
index f33c63b4e..42583b8af 100644
--- a/tests/extmod/uctypes_array_assign_native_le_intbig.py
+++ b/tests/extmod/uctypes_array_assign_native_le_intbig.py
@@ -1,4 +1,4 @@
-import sys
+import usys
 
 try:
     import uctypes
@@ -6,7 +6,7 @@ except ImportError:
     print("SKIP")
     raise SystemExit
 
-if sys.byteorder != "little":
+if usys.byteorder != "little":
     print("SKIP")
     raise SystemExit
 
diff --git a/tests/extmod/uctypes_native_le.py b/tests/extmod/uctypes_native_le.py
index 7958e5c22..9889b98e9 100644
--- a/tests/extmod/uctypes_native_le.py
+++ b/tests/extmod/uctypes_native_le.py
@@ -1,7 +1,7 @@
 # This test is exactly like uctypes_le.py, but uses native structure layout.
 # Codepaths for packed vs native structures are different. This test only works
 # on little-endian machine (no matter if 32 or 64 bit).
-import sys
+import usys
 
 try:
     import uctypes
@@ -9,7 +9,7 @@ except ImportError:
     print("SKIP")
     raise SystemExit
 
-if sys.byteorder != "little":
+if usys.byteorder != "little":
     print("SKIP")
     raise SystemExit
 
diff --git a/tests/extmod/uctypes_ptr_le.py b/tests/extmod/uctypes_ptr_le.py
index 5d8094ee4..f475465ae 100644
--- a/tests/extmod/uctypes_ptr_le.py
+++ b/tests/extmod/uctypes_ptr_le.py
@@ -1,4 +1,4 @@
-import sys
+import usys
 
 try:
     import uctypes
@@ -6,7 +6,7 @@ except ImportError:
     print("SKIP")
     raise SystemExit
 
-if sys.byteorder != "little":
+if usys.byteorder != "little":
     print("SKIP")
     raise SystemExit
 
diff --git a/tests/extmod/uctypes_ptr_native_le.py b/tests/extmod/uctypes_ptr_native_le.py
index 8ca4d2c55..ca2b316c5 100644
--- a/tests/extmod/uctypes_ptr_native_le.py
+++ b/tests/extmod/uctypes_ptr_native_le.py
@@ -1,4 +1,4 @@
-import sys
+import usys
 
 try:
     import uctypes
@@ -6,7 +6,7 @@ except ImportError:
     print("SKIP")
     raise SystemExit
 
-if sys.byteorder != "little":
+if usys.byteorder != "little":
     print("SKIP")
     raise SystemExit
 
diff --git a/tests/extmod/vfs_fat_more.py b/tests/extmod/vfs_fat_more.py
index d8449829d..076802f6a 100644
--- a/tests/extmod/vfs_fat_more.py
+++ b/tests/extmod/vfs_fat_more.py
@@ -111,10 +111,10 @@ print(uos.listdir())
 print(uos.listdir("sys"))
 
 # test importing a file from a mounted FS
-import sys
+import usys
 
-sys.path.clear()
-sys.path.append("/sys")
+usys.path.clear()
+usys.path.append("/sys")
 with open("sys/test_module.py", "w") as f:
     f.write('print("test_module!")')
 import test_module
diff --git a/tests/extmod/vfs_lfs_mount.py b/tests/extmod/vfs_lfs_mount.py
index 9207f4a8c..2c40b2989 100644
--- a/tests/extmod/vfs_lfs_mount.py
+++ b/tests/extmod/vfs_lfs_mount.py
@@ -68,17 +68,17 @@ def test(bdev, vfs_class):
     uos.umount("/lfs")
 
     # clear imported modules
-    sys.modules.clear()
+    usys.modules.clear()
 
 
 bdev = RAMBlockDevice(30)
 
 # initialise path
-import sys
+import usys
 
-sys.path.clear()
-sys.path.append("/lfs")
-sys.path.append("")
+usys.path.clear()
+usys.path.append("/lfs")
+usys.path.append("")
 
 # run tests
 test(bdev, uos.VfsLfs1)
diff --git a/tests/extmod/vfs_userfs.py b/tests/extmod/vfs_userfs.py
index 3cdfe82ee..570b83353 100644
--- a/tests/extmod/vfs_userfs.py
+++ b/tests/extmod/vfs_userfs.py
@@ -1,7 +1,7 @@
 # test VFS functionality with a user-defined filesystem
 # also tests parts of uio.IOBase implementation
 
-import sys
+import usys
 
 try:
     import uio
@@ -76,9 +76,9 @@ f = open("/userfs/data.txt")
 print(f.read())
 
 # import files from the user filesystem
-sys.path.append("/userfs")
+usys.path.append("/userfs")
 import usermod1
 
 # unmount and undo path addition
 uos.umount("/userfs")
-sys.path.pop()
+usys.path.pop()