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

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

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

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

with comments from the peer view addressed

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

port over tensor_op_fusion pass

add fusion support for prebuildOpeartion (TensorOpeartion)

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

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

From: @ziruiwu
Reviewed-by: @mikef
Signed-off-by:

From: @lixiachen
Reviewed-by: @liucunwei,@pandoublefeng
Signed-off-by: @liucunwei,@liucunwei

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

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

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

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

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

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

and other minor cache changes

From: @lixiachen
Reviewed-by: @jonyguo,@heleiwang
Signed-off-by: @heleiwang

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

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

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