From: @lijiaqi0612
Reviewed-by: 
Signed-off-by:

From: @lijiaqi0612
Reviewed-by: 
Signed-off-by:

From: @lijiaqi0612
Reviewed-by: 
Signed-off-by:

From: @yanglf1121
Reviewed-by: @wuxuejian
Signed-off-by: @wuxuejian

From: @TFbunny
Reviewed-by: @tom__chen,@robingrosman
Signed-off-by: @robingrosman

changed default max_output_length to 1000000

change docstring

fix ci

change max_output_length to maxlen

From: @david-he91
Reviewed-by: @liangchenghui
Signed-off-by: @liangchenghui

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

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

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

1. Support explainer raise an RuntimeError exception
2. fix the ut of SummaryRecord

From: @yuanwei66
Reviewed-by: @c_34,@wuxuejian
Signed-off-by: @wuxuejian

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

From: @jonwe
Reviewed-by: @robingrosman,@tom__chen,@robingrosman,@tom__chen
Signed-off-by: @tom__chen

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

From: @Somnus2020
Reviewed-by: @kingxian
Signed-off-by: @kingxian

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

From: @ouwenchang
Reviewed-by: @wuxuejian,@lilongfei15
Signed-off-by: @wuxuejian

From: @xuguoyang5566
Reviewed-by: @wuxuejian
Signed-off-by: @wuxuejian

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

From: @dinglongwei
Reviewed-by: @wuxuejian,@c_34
Signed-off-by: @wuxuejian,@c_34

From: @yepei6
Reviewed-by: @kisnwang,@kingxian
Signed-off-by: @kingxian

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

From: @xutianming1985
Reviewed-by: @liangchenghui,@c_34
Signed-off-by: @liangchenghui

From: @anrui-wang
Reviewed-by: 
Signed-off-by:

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

A minor change in sigmoidGradGrad operation (non-functional change).

From: @shibeiji
Reviewed-by: @liangchenghui,@wuxuejian
Signed-off-by: @liangchenghui

From: @ouwenchang
Reviewed-by: @wenkai_dist,@wangyue01
Signed-off-by: @wangyue01

From: @d00562747
Reviewed-by: 
Signed-off-by: