From: @ezphlow
Reviewed-by: @robingrosman,@nsyca,@robingrosman
Signed-off-by: @robingrosman

Added validator checks

Added builtin sampler check

Added proper input check for samplers

From: @hfarahat
Reviewed-by: @robingrosman,@nsyca
Signed-off-by: @robingrosman

From: @luoyang42
Reviewed-by: @liucunwei
Signed-off-by: @liucunwei

From: @ms_yan
Reviewed-by: @lilongfei15
Signed-off-by:

DistributedSampler with GeneratorOp bug
Issue#2:
GeneratorOp with iterable source doesn't respect num_samples
Issue#3:
Generator with schemas does not take samplers

add hostpush part modify

optimize previous code

provide aclhandle access method

modify CMakeList format

add device_id parameter into TransferNode

From: @ming__blue
Reviewed-by: 
Signed-off-by:

fix rebase confict

add operator profiling part

add op_id param when create task

repair bugs in op cpu sampling

fix wrong order of write and parse cpu_info

add process cpu profiling part

add multiprocessing part(part 1)

adapter cpu_sampling c layer

fix little error in sampling

descrease cirle complex in voc

descrease cirle complex in device_que

From: @luoyang42
Reviewed-by: 
Signed-off-by:

1. description of num_shard in datasets.py
2. add param validation for sampler
3. add description for add_child in sampler.py

From: @hfarahat
Reviewed-by: 
Signed-off-by:

From: @alexyuyue
Reviewed-by: 
Signed-off-by:

Signed-off-by: alex-yuyue <yue.yu1@huawei.com>

From: @ezphlow
Reviewed-by: 
Signed-off-by:

map validate params

Changing bindings

Change behavior of vision.cc

Added signature and changed Cmake

Compiling

Need to fix compile

Added compiling random transforms

python changes for decoupling

two failed test case remaining

Compiling random choice

passes all ut

Changed assert

review comments

Added validate params

add back return value

Fix lint

py lint fix

pylint 2

Addressing comments

From: @heleiwang
Reviewed-by: @liucunwei,@wangyue01
Signed-off-by: @liucunwei

From: @heleiwang
Reviewed-by: 
Signed-off-by:

From: @hfarahat
Reviewed-by: @nsyca,@pandoublefeng
Signed-off-by: @pandoublefeng

From: @lixiachen
Reviewed-by: @mikef,@nsyca
Signed-off-by: @nsyca

From: @xiefangqi
Reviewed-by: 
Signed-off-by: