How do you programmatically create a Google BigQuery schema in a tuple?
We are trying to create a table in BigQuery. We have code working from a Google example that creates the schema - but the code specifying the schema is in a tuple.
The code looks like this:
table.schema = (
bigquery.SchemaField('Name', 'STRING'),
bigquery.SchemaField('Age', 'INTEGER'),
bigquery.SchemaField('Weight', 'FLOAT'),
)
The problem we face is that we have the header fields we need in a list (i.e. [“Name”, “Age”, “Weight”]) - but as we understand it - tuples are immutable.
As a result, we are unable to do code like this because it throws an immutable object error:
for field in field_list:
table.schema.append(field, ‘STRING’)
How do we create the table schema from a list of headers when the tuple structure is immutable? How do we create all the fields in the object?
python google-bigquery tuples
asked Nov 17 '18 at 14:05
PraxitelesPraxiteles
2,70132338
add a comment |
We are trying to create a table in BigQuery. We have code working from a Google example that creates the schema - but the code specifying the schema is in a tuple.
The code looks like this:
table.schema = (
bigquery.SchemaField('Name', 'STRING'),
bigquery.SchemaField('Age', 'INTEGER'),
bigquery.SchemaField('Weight', 'FLOAT'),
)
The problem we face is that we have the header fields we need in a list (i.e. [“Name”, “Age”, “Weight”]) - but as we understand it - tuples are immutable.
As a result, we are unable to do code like this because it throws an immutable object error:
for field in field_list:
table.schema.append(field, ‘STRING’)
How do we create the table schema from a list of headers when the tuple structure is immutable? How do we create all the fields in the object?
python google-bigquery tuples
asked Nov 17 '18 at 14:05
PraxitelesPraxiteles
2,70132338
Is there a reason not to execute a DDL statement as a query instead? cloud.google.com/bigquery/docs/reference/standard-sql/…
– Elliott Brossard
Nov 17 '18 at 14:18
What do you mean by the header fields are in a list? Do you have an example?
– Willian Fuks
Nov 17 '18 at 14:22
@WillianFuks Updated the question with the example list.
– Praxiteles
Nov 17 '18 at 14:30
Can you show what you tried so far?
– Martin Weitzmann
Nov 17 '18 at 15:51
i am not sure what exactly the problem :o( can you elaborate please?
– Mikhail Berlyant
Nov 17 '18 at 18:12
add a comment |
We are trying to create a table in BigQuery. We have code working from a Google example that creates the schema - but the code specifying the schema is in a tuple.
The code looks like this:
table.schema = (
bigquery.SchemaField('Name', 'STRING'),
bigquery.SchemaField('Age', 'INTEGER'),
bigquery.SchemaField('Weight', 'FLOAT'),
)
The problem we face is that we have the header fields we need in a list (i.e. [“Name”, “Age”, “Weight”]) - but as we understand it - tuples are immutable.
As a result, we are unable to do code like this because it throws an immutable object error:
for field in field_list:
table.schema.append(field, ‘STRING’)
How do we create the table schema from a list of headers when the tuple structure is immutable? How do we create all the fields in the object?
python google-bigquery tuples
asked Nov 17 '18 at 14:05
PraxitelesPraxiteles
2,70132338
We are trying to create a table in BigQuery. We have code working from a Google example that creates the schema - but the code specifying the schema is in a tuple.
The code looks like this:
table.schema = (
bigquery.SchemaField('Name', 'STRING'),
bigquery.SchemaField('Age', 'INTEGER'),
bigquery.SchemaField('Weight', 'FLOAT'),
)
The problem we face is that we have the header fields we need in a list (i.e. [“Name”, “Age”, “Weight”]) - but as we understand it - tuples are immutable.
As a result, we are unable to do code like this because it throws an immutable object error:
for field in field_list:
table.schema.append(field, ‘STRING’)
How do we create the table schema from a list of headers when the tuple structure is immutable? How do we create all the fields in the object?
python google-bigquery tuples
python google-bigquery tuples
asked Nov 17 '18 at 14:05
PraxitelesPraxiteles
2,70132338
asked Nov 17 '18 at 14:05
PraxitelesPraxiteles
2,70132338
edited Nov 18 '18 at 1:59
Praxiteles
asked Nov 17 '18 at 14:05
PraxitelesPraxiteles
2,70132338
asked Nov 17 '18 at 14:05
PraxitelesPraxiteles
2,70132338
asked Nov 17 '18 at 14:05
PraxitelesPraxiteles
2,70132338
2,70132338
Is there a reason not to execute a DDL statement as a query instead? cloud.google.com/bigquery/docs/reference/standard-sql/…
– Elliott Brossard
Nov 17 '18 at 14:18
What do you mean by the header fields are in a list? Do you have an example?
– Willian Fuks
Nov 17 '18 at 14:22
@WillianFuks Updated the question with the example list.
– Praxiteles
Nov 17 '18 at 14:30
Can you show what you tried so far?
– Martin Weitzmann
Nov 17 '18 at 15:51
i am not sure what exactly the problem :o( can you elaborate please?
– Mikhail Berlyant
Nov 17 '18 at 18:12
add a comment |
Is there a reason not to execute a DDL statement as a query instead? cloud.google.com/bigquery/docs/reference/standard-sql/…
– Elliott Brossard
Nov 17 '18 at 14:18
What do you mean by the header fields are in a list? Do you have an example?
– Willian Fuks
Nov 17 '18 at 14:22
@WillianFuks Updated the question with the example list.
– Praxiteles
Nov 17 '18 at 14:30
Can you show what you tried so far?
– Martin Weitzmann
Nov 17 '18 at 15:51
i am not sure what exactly the problem :o( can you elaborate please?
– Mikhail Berlyant
Nov 17 '18 at 18:12
Is there a reason not to execute a DDL statement as a query instead? cloud.google.com/bigquery/docs/reference/standard-sql/…
– Elliott Brossard
Nov 17 '18 at 14:18
Is there a reason not to execute a DDL statement as a query instead? cloud.google.com/bigquery/docs/reference/standard-sql/…
– Elliott Brossard
Nov 17 '18 at 14:18
What do you mean by the header fields are in a list? Do you have an example?
– Willian Fuks
Nov 17 '18 at 14:22
What do you mean by the header fields are in a list? Do you have an example?
– Willian Fuks
Nov 17 '18 at 14:22
@WillianFuks Updated the question with the example list.
– Praxiteles
Nov 17 '18 at 14:30
@WillianFuks Updated the question with the example list.
– Praxiteles
Nov 17 '18 at 14:30
Can you show what you tried so far?
– Martin Weitzmann
Nov 17 '18 at 15:51
Can you show what you tried so far?
– Martin Weitzmann
Nov 17 '18 at 15:51
i am not sure what exactly the problem :o( can you elaborate please?
– Mikhail Berlyant
Nov 17 '18 at 18:12
i am not sure what exactly the problem :o( can you elaborate please?
– Mikhail Berlyant
Nov 17 '18 at 18:12
add a comment |
1 Answer
1
active
oldest
votes
I think you just need this:
from google.cloud import bigquery
headers = [
('Name', 'STRING'),
('Age', 'INTEGER'),
('Weight', 'STRING'),
('any_thing_else', 'STRING'), ...
]
schema = map(lambda n: bigquery.SchemaField(*n), headers)
table.schema = tuple(schema)
answered Nov 19 '18 at 18:40
khankhan
1,96683052
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
I think you just need this:
from google.cloud import bigquery
headers = [
('Name', 'STRING'),
('Age', 'INTEGER'),
('Weight', 'STRING'),
('any_thing_else', 'STRING'), ...
]
schema = map(lambda n: bigquery.SchemaField(*n), headers)
table.schema = tuple(schema)
answered Nov 19 '18 at 18:40
khankhan
1,96683052
add a comment |
I think you just need this:
from google.cloud import bigquery
headers = [
('Name', 'STRING'),
('Age', 'INTEGER'),
('Weight', 'STRING'),
('any_thing_else', 'STRING'), ...
]
schema = map(lambda n: bigquery.SchemaField(*n), headers)
table.schema = tuple(schema)
answered Nov 19 '18 at 18:40
khankhan
1,96683052
add a comment |
I think you just need this:
from google.cloud import bigquery
headers = [
('Name', 'STRING'),
('Age', 'INTEGER'),
('Weight', 'STRING'),
('any_thing_else', 'STRING'), ...
]
schema = map(lambda n: bigquery.SchemaField(*n), headers)
table.schema = tuple(schema)
answered Nov 19 '18 at 18:40
khankhan
1,96683052
I think you just need this:
from google.cloud import bigquery
headers = [
('Name', 'STRING'),
('Age', 'INTEGER'),
('Weight', 'STRING'),
('any_thing_else', 'STRING'), ...
]
schema = map(lambda n: bigquery.SchemaField(*n), headers)
table.schema = tuple(schema)
answered Nov 19 '18 at 18:40
khankhan
1,96683052
answered Nov 19 '18 at 18:40
khankhan
1,96683052
answered Nov 19 '18 at 18:40
khankhan
1,96683052
answered Nov 19 '18 at 18:40
khankhan
1,96683052
1,96683052
add a comment |
add a comment |
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Is there a reason not to execute a DDL statement as a query instead? cloud.google.com/bigquery/docs/reference/standard-sql/…
– Elliott Brossard
Nov 17 '18 at 14:18
What do you mean by the header fields are in a list? Do you have an example?
– Willian Fuks
Nov 17 '18 at 14:22
@WillianFuks Updated the question with the example list.
– Praxiteles
Nov 17 '18 at 14:30
Can you show what you tried so far?
– Martin Weitzmann
Nov 17 '18 at 15:51
i am not sure what exactly the problem :o( can you elaborate please?
– Mikhail Berlyant
Nov 17 '18 at 18:12