<filename>section4/list_comprehension.py
#!/usr/bin/env python
#
# Copyright 2015 <NAME>
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

## List Comprehension

## Structure:
## [ <term> <for> (optional <for> or <if>)]

## Any number of optional clauses (for, if)

## Read Left to Right except the Term which is read last.

## Term is defined in the clauses.

## uses square brackets

statement = [('what','1'),('good','2')]

##result = []
##for a,b in statement:
##    if a in ['good','bad','ugly']:
##        result.append(b)
##

result = [b for a,b in statement if a in ['good','bad','ugly']]

print result

<filename>section4/list_comprehension.py
#!/usr/bin/env python
#
# Copyright 2015 <NAME>
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.

## List Comprehension

## Structure:
## [ <term> <for> (optional <for> or <if>)]

## Any number of optional clauses (for, if)

## Read Left to Right except the Term which is read last.

## Term is defined in the clauses.

## uses square brackets

statement = [('what','1'),('good','2')]

##result = []
##for a,b in statement:
##    if a in ['good','bad','ugly']:
##        result.append(b)
##

result = [b for a,b in statement if a in ['good','bad','ugly']]

print result

#!/usr/bin/env python # # Copyright 2015 <NAME> # # Licensed under the Apache License, Version 2.0 (the "License"); you may # not use this file except in compliance with the License. You may obtain # a copy of the License at # #     http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, WITHOUT # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the # License for the specific language governing permissions and limitations # under the License. ## List Comprehension ## Structure: ## [ <term> <for> (optional <for> or <if>)] ## Any number of optional clauses (for, if) ## Read Left to Right except the Term which is read last. ## Term is defined in the clauses. ## uses square brackets ##result = [] ##for a,b in statement: ##    if a in ['good','bad','ugly']: ##        result.append(b) ##